A short history of the compass
given here in
Miscellaneous/History. You will find more technical details about ships
compasses in the excellent book COMPASS,
A Story of Exploration and Innovation
by Alan Gurney (W.W. Norton & Co. NY, 2004) - For more books,
see also Miscellaneous/History &
Bibliography. Concerning modern
ships compasses, go to the website
of the Hong-Kong company AMEE & Co. : NAUTICAL
Pic. at r.: view of ship's
compasses in a British encyclopedia (1826)
- A -
ACD422 is the designation of a compass
built in a cylindrical casing. The only information available are the
markings (see pictures below).
Manufacturer unknown (thank
you for helping with any clues!)
part of a periscope
where the main compass is mounted on the flying bridge, above the main,
covered bridge, and where it is read from below through a periscope.
Description: divided circle of the card visible on both sides
(compare to tell-tale
reference symbol: fleur-de-lis. Magnetic
needle: two bars. Card: equipped with float.
on the pictures for enlarged views)
Dimensions (height x dia.):
5 x 4-1/2" (130 x 110mm)
- Top: Binnacle WD 150 Gauge
Dia. of shoulder: 31191
Dia. of seating: 33148
- Side: ACD422
The Admiralty was a department of the Royal Navy (see WIKIPEDIA)
created in 1842.
The history of the Admiralty's Compass Department is
portraited in the book Steady
as she goes
(A. E. Fanning,
1986). It was headed by a Superintendent
The most famous ones were Johnson, Creak,
Chetwynd, Creagh-Osborne etc.
This dept. was also responsible for the aircraft
of the Naval Fleet until WW1.
The Board of Admiralty was abolished in 1964 and its functions
integrated into the Ministry of Defence.
See also the Admiralty's Pattern
PROFILE - Former U.S. manufacturer (more information HERE
See also pocket and lapel
and wrist compass
on the picture
for an enlarged view)
Pictures J. Houcke
92 Course Monitor (1958) - Technical
- Dimensions (height x diam. basis) : 5 x 4-1/2" (13
- Weight : c. 1 pound (500 gr)
- Serial no. of parts: P-4549 and P-4551
- Divisions: no divisions and cardinals but only the six
letters (every 60 deg.) ABCXYZ. The Y points North.
The pointer's position can be adusted within +/-30°.
The abbreviated axiis are engraved on the base rim: NS and EW
for North-South and East-West in a 90 deg. angle. (Copies of
description and advertisement available on request).
The normal compass was called NAUTILUS (no. 90).
item was meant to be used in addition to the normal compass.
soon as the boat was on course, the index pointer was set on the
nearest letter representing thus a target easy to follow.
PROFILE - Hermann (Hubert Josef) Anschütz-Kaempfe (*
3 October 1872 in Zweibrücken; †
6 May 1931 in
Munich) was a German scientist and the inventor of the compass gyro
patent no. 182.855, issued 27 Apr. 1904). The
& Co. was created
on 28 October
1905 in Kiel and taken over by Raytheon in 1995 (source City Archives,
Since this device is a
gyroscopic and not a magnetic compass, we do not deal with it in this
museum (see also Sperry pat. 1,279,479).
Concerning the magnetic compasses for German WW1 submarines,
The French newspaper La Croix
wrote in 1907 that the
system could not work. A few years later, the German submarines were
Labels on binnacle and connectors box
on images for enlarged views)
Fotos A. König
| Technical Data
- Height of binnacle: 1080 mm
- Dia. of compass: 245 mm
- Dia. of base plate: 380 mm
- Markings: Eagle and svastika of the Kriegsmarine
(during Germany's IIIrd Reich) above the Marine's 'M' and left
- German manufacturer (See also Wrist and Marching compasses -
more information HERE
3-letter-code during WWII was bxx
on link for pic. courtesy J-L Rosoux.
central part marked ASKANIA came
probably after WWII in replacement for a part bearing the nazi eagle
at right courtesy
The first Askania compasses are identical to the Carl
Bamberg instruments, only the designation varies. In the following
catalogues different abreviations are used. It is not possible to show
the complete scope. The figure represents the card's
diameter in mm. Pictures of compasses in the table below are
taken from the catalogues "Nautik 35 and Nautik 36" and also from the
catalogue of Askania VEB Teltow.
In 1954, due to the existence of ASKANIA West Germany (FRG), the plants
in the communist East Germany (GDR) were renamed into VEB
Geräte- und Regler-Werke Teltow
- 2nd row in table
3rd row: This is not a compass but a pelorus
Cards for dry card and for fluid-damped compasses
Askania - VEB TELTOW (former GDR, inside
on the pictures for enlarged views)
courtesy Holger "beutelbuch*de"
- Dimensions (L x H): ca. 200x200mm
- Diameter of base disc: 150mm
- Weight: ?
- Manufacturer: Askania VEB (East Germany) between 1948-1954
This instrument was usually installed on both ship's bridge wings.
A Ludolph gyrocompass
- Manufacturer: BODAN / Perkin-Elmer (after take-over of ASKANIA's
plant Bodenseewerk, West Germany, in 1955)
- NSN: 4920-12-120-6495
- Tools: s. pic. below
Link to pic of Prüfschein (control report)
Nkl 30 (1943)
- Dia.: 62mm (48mm w/o ring); Height: 35mm
- Read more details in the article U-Boot
with transparent capsule and wrist strap
Ext. markings: none
Divisions: 360°, written by hand (prototype)
Dim. (w/o vanes):
- Diam.: 2" (50mm); Height: c.1" (22mm)
was a Danish compass maker of Copenhagen (KJØBENHAVN). The
entry for 1826-1862 in the future data base “Sejl- flag- og
arkiv” (archive of guild
of sails, flags and compass makers)
contain some info (email sent by Tobias Reinel of the city's archive
office). Family data
(height 115mm, Ø 160mm)
by courtesy of Th. Steffen
signature inside the compass:
Pic at right: View of an early
compass rose (1850 ?) published in Der
Kompass (1911 - for details go to menue pt. Miscell. /
System used for compass adjusting
(link to a specialized website
Examples: C. Plath, London Polaris Pelorus
- B -
(link to pic
was the name of a compass utilized in the Yugoslavian Navy. It is
described in the 1964 manual MAGNETSKI KOMPAS
PROFILE - Carl Bamberg was a German compass manufacturer located in
near Berlin (for more information click HERE
company merged in 1921 with ASKANIA (above). Other products: see also
Pocket and Aeronautical
The catalogue Nautik
(pic at right) describes compasses and binnacles (see table
below). Another catalog (link to pic. Nautik
) describes the Instruments
necessary for determining the magnetic forces and swinging the
Submarines (U-boote) were equiped with Anschütz gyro-compasses
for more safety a conventional compass was also installed on-board. See
specific entry U-Boot
Concerning type M 414 the following explanation was published on the
warrelics.eu by drmessimer
were introduced into the
Kaiserliche-Marine in 1908 and were
installed in four early Körting engine U-boats, U-1 to 4.
in 1910, only one and three axis gyro-compasses were installed in the
U-boats under construction (U-5 to 15) and all subsequent boats until
the end of the war. No magnetic compasses were installed in U-boats
that were launched after 1909"
(source: Arno Spindler, Der
U-Booten, Chapter 10 - Das U-Bootsmaterial. Die
militärisch-technischen Vorbereitung und Vorbedingungen
den U-Bootskrieg, pp. 78-94, E. S. Mittler & Sohn, 1932). They
installed in surface craft throughout the war, but not used
as the primary navigating compass."
|Model Ktp250 -
(Compare to Hechelmann's design, see also Kelvite)
|Cards signed by
BAMBERG used by the German Imperial
See also the ASKANIA catalogue above.
Normalkompass" (large standard comp.)
Ktp 200 and "kleiner Normalkompass" (small standard comp.) Ktp 115
Technical Data Ktp200 / Ktp115:
- Weight (with parts): 17 kg / 5 kg
- Diam. rose: 200 mm / 115 mm
* NOTE: Designations vary in the catalogues
The compass Ktp200 was supplied with two roses
comprising each four bar needles: flat on the one, and vertical on the
other (see below)
Note: the rose of compass type Ktp115 only had two needles.
of winds featuring
the German Emperor's crown below the fleur de lys
with vertical bar
PROFILE - Francis Barker & Son was a British manufacturer (more
and in our LINKS).
See also Marching, Escape, Pocket, Survey and Wrist compasses.
Catalogue for the year 1930
by courtesy of TradeMarkLondon.com
Comment: This compass is a very rare item. It was made by Francis
Barker during his apprenticeship when he was 15. His signature on the
card underside and even his fingerprints on the balancing wax can be
seen. Read the full story here: TRADEMARKLONDON.com
Liquid and dry-card steering boat compasses in slide lid oak box - 1st
half of 19th C.
- Bowl and rings: brass
- Point: steel or iridium
- Cap: sapphire or agate
- Diameter (card): avlbl. from 3 to 8 in.
Professor Peter Barlow (Royal Military Academy) designed in
1819 a disk-shaped device representing the metallic mass of a ship and
which was placed near the compass to correct it. It was not as good as
Flinders' bar but was installed for many years in ships during the 19th
PROFILE - Former French compass maker located in Marseilles.
Jaypee - Musée de la Marine, Marseille
for enlarged view)
Built ca. mid 18th C.
- Divisions : rhumbs - see CARDINALS
French company, Division of AMESYS - see Bianchetti below
Former French company created in 1826 and located in
Marseilles also known as Ateliers Julien.
Partly taken over by
BEN (Bianchetti Electronique Navigation) in 1962.
Ø 26 cm, Paper mounted on
a mica substrate
Picture by courtesy of T.
Card: compare to KELVITE
Pic courtesy Jaypee
given in a late 19th c. book:
binnacle is a waist-high case or stand on the deck of a ship,
generally mounted in front of the helmsman, in which navigational
instruments are placed for easy and quick reference as well as to
protect the delicate instruments. Its traditional purpose is to hold
the ship's magnetic compass, mounted in gimbals to keep it level while
the ship pitched from waves. A binnacle may be subdivided into sections
and its contents typically include one or more compasses and an oil
lamp or other light source. Other devices such as a sand timer for
estimating speed may have been stored in the binnacle as well.
of antique systems are displayed in the entries: DENT, KELVIN, PLATH.
The Carl Bamberg catalogue Nautik
and the catalogue Nautik
(1930's) published by its
describe several models of binnacles: type
Khp200, Kh225 etc. (click
below to display cutaway views)
The German Navy (Kriegsmarine
defined during WWII a common standard system
The French inventor Ernest
BISSON was granted in 1878 a patent
to p. 1 & 2
for a system that made it (theoretically) possible to transmit to
"slaved indicators" akin to the telegraph, the
delivered by a "master compass" located in a place on a ship where it
wouldn't be disturbed by metallic masses and electromagnetic fields.
One can consider this invention as a predecessor of Albert
remote compass (see aeronautical compasses
To this aim, BISSON proposed to use a compass fitted with a two-ring circular
(link to pic
) of the
type (read the article
On the outer ring, each division (degree or half degree) would
deeply engraved and filled with an insulating material. Two
contacts shaped like tiny wheels located at the end of balanced levers
would roll on the rings (link
These are part of an electrical circuit supplied by a battery and
perpendicularly to the needle so as not to disturb it. One wheel would
roll on the inner ring and the other one on the outer ring where the
insulating material would interrupt the circuit at each crossing of a
division. These signals are then transmitted to electromagnets which
convert this information into movements via two clock mechanisms
(anchor escapement), one for each direction of rotation. This movement
activates indicators (compass-like displays in binnacles or pointers on
scales "like a barometer"). Moreover, each change in the direction of
rotation is detected by a tiny "blade" located above the needle centre
and which is also integrated in an electrical circuit. This blade is
coated on one face with insulating material so that the circuit is
interrupted or closed each time the rotation changes (CW or CCW).
For a copy of the complete document ask the curator (CONTACT button).
DEFINITION - "Boxing the Compass
" (follow the link to read the
entry in the Concise Oxford Dictionary
) was a basic skill
of any sailor,
being the ability to repeat all 32 points of the
points), a 'point' representing an angle of 11¼
degrees. Modern compasses are divided into 360 degrees, 0 (or 360)
being North, 90 East, etc. (read
more explanations HERE
sailors learning the
way of seeing
PROFILE - see Pocket and Marching compasses. This compass is not
gimballed. It is more probably designed for use in a land vehicle.
Picture courtesy alibabroc
Click on the images for enlaged
Dia. base plate: 130 mm
Height: approx. 90 mm
Dia. compass: 60 mm
Dia. cowling: approx. 110 mm
The eight copper springs ensure an inductive damping of
- C -
Louis Pascal [formerly Luigi Pasquale]
Casella was a British manufacturer of scientific instruments British.
See also Pocket and Survey compasses.
Catalogue (c. 1876)
Open at the pages showing the SHIPS' COMPASSES.
Picture courtesy Michael Curtis
on image for full screen view)
CASSENS was a German company founded in 1902 by Captain Tanne
Janssen Cassens and a partner called Bennecke. It was a retailer for
nautical materiel and was located first in
Tannenstr. 32 (later Sorgenfrei 39-40) and now in Bremerhaven, Am
Lunedeich 131. In 1908, Theodor PLATH
took a participation in Cassens and the name was changed to Cassens
& Plath. In 1962 bought Cassens C. Plath.
of a compass
displayed on the header of CASSENS & PLATH's website.
on the pictures for
Description of the logo: read the chapter dedicated to C.
The tell-tale compass at right features another logo. Year of
Charles Gerard Conn, a famous instruments
manufacturing company was caused to retool its
manufacturing during part of the war years. The identification
U.S. Navy - Bureau of Ships
Mounted - Compass
Mark I Serial __(blank)__ - 1943
Mod O Cont. NXSS-36876
C.G. Conn, Ltd.
Elkhart, Indiana. (Read more info HERE:
courtesy P. Barnett
Captain Louis Wentworth Pakington Chetwynd (b. 15
December 1866, d. 18 April 1914, Coombe Neville,
Kingston-on-Thames, Surrey) was Superintendent of the Compass Dept. at
during the early 20th C. He resumed the work of other
inventors (see Crow, Creak) and patented several compass
(see also Wrist compasses).
Among his improvements was the design of a smaller compass card in the
bowl. This solved the problem called the "swirl error" caused
by the moving liquid during quick movements (like course
changes and heeling) of the ship. He became 1912 managing director with
Dent & Co. and Johnson Ltd.
also Marching and Wrist compasses and also WBT.
on the pictures for
| Technical data
Drawings at left: A. Schück, Der
courtesy of Aaron Chetwynd)
Bearing prismatic compass with integrated electrical light. The patent
no. 25,965 was issued in 1906 when Chetwynd already was a retired RN
captain and refers to a gimballed
mariners' compass (link
PROFILE : Chinese compass, XIXth C. Description given by J.
Klaproth in Lettre
à M. le Baron A. de Humboldt
p. 103 and foll.,
"The 24 Tcheou
or steering directions)
consist of the twelve signs of the
12-signs-cycle*, eight of the 10-signs-cycle** (see below) and
four of the eight kua
(trigrams, see Compass types / Religion-China).
* (Usual on Japanese
Note: Klaproth marked
these with an asterisk (* - see table below). The two
signs used are
Ki (..?) and Wo (...?) .
Picture Jaypee -
Musée de la Marine, Paris
on images for enlarged views)
- Diameter: c. 150mm
- Height: c. 100mm
- Divisions: 24 Tcheou
(See also MISCELLANEOUS/
Cardinals / China
and also Compass types / Religion / Chinese
Table: the 24 Tcheou.
Lettre à M. le Baron A. de Humboldt)
The ten celestial stems
? - Appendix A.III)
PROFILE - Clement Clarke was a famous British optician who
microscopes and various diagnostic equipment. The company was
established in 1917 (Wigmore Street, London). Clarke
VI pocket compasses* probably manufactured by F. Barker & Son
some other compass maker like Dennison during WW1. In 1986 the
group was acquired by Boots Plc and in 1989 was purchased by the Swiss
based company Haag-Streit AG located in Berne.
Dimensions (approx.): 150 x 150 x 70 mm
Additional instruments: two levels, clinometer in the lid,
- Sighting vanes: two vertical tabs with a pin-hole each in
the left and right
case walls. A foldable two-piece telescope.
Centimeter ruler on the
NOTE: This bearing compass is a (worthless) contemporary
reproduction (see MISCELLANEOUS
/ Fakes). One can tell this by some details like the magnetic
and the green central jewel in the cap. The clinometer's
arrow point is also at
least very unprecise. It is highly improbable
that Clarke ever produced such an antique
on the image at left for
an enlarged view)
By virtue of the international convention for the Safety Of Life At
Ch. V, Reg.
126.96.36.199), the International Maritime Organization
(OMI), an agency of
the UNO requires the following:
navigational equipment and systems All ships irrespective of size shall have: a
properly adjusted standard magnetic compass or
other means, independent of any power supply to determine the ship's
heading and display the reading at the main steering position;
the testing activities of magnetic compasses is one of the
responsibilities of the Bundesamt
für Seeschifffahrt und Hydrographie
(Federal Maritime and Hydrography Agency) in Hamburg, successor of the Deutsche Seewarte
office specifically in charge of this task is the Magnetkompasslabor
is situated in a small building built in 1950 on top of the
the former castle of the Seewarte destroyed in 1943 stood. It
especially protected against all magnetic
means large-sized coils
(link to a sketch
These coils also make it possible to simulate any terrestrial magnetic
environment. The labor comprises all sorts of test equipment (see table
below) and also a small museum (not open for visitors
compass laboratory in 1950
(in the background at r.: Bismarck's statue). It is today concealed by trees *
Pictures by courtesy of
BSH (Click on the
images for enlarged views)
Measuring the intensity of magnets with a special BUSCH
magnetometer (placed on
central rig). Link
to user instr. (1943).
Inside view - at centre :
large rig for measurement of electromagnetic interferences
Dimensions check rig
Test rig for viscosity check of fluids when rotating
Thermal test chamber
Vibration test on horizontal and vertical axii.
Test rig for tilting and rotating together with binnacle
Test rig for rotation when tilted
of the Admiralty
was in charge of this task. See also the regulations of the Maritime
& Coastguard Agency.
and in many countries the organisation called Bureau
Veritas is entitled by the governments to perform the control of
In the Unites
States of America
... (no information
There are many different compass types: the large gimballed
integrated in a binnacle
and the smaller removable dory
in a wooden box (ex.: VION), not to forget the overhead hung telltale
compass. For more precise details about compass functionalities, go to
chap. 2.1 General
of the ISO 1069
standard. See also the various patterns
defined by the British Admiralty.
PROFILE - Captain Frank Osborne Creagh-Osborne (1867/1943) was
Superintendent of Compasses (successor of Captn. Chetwynd) at the
Admiralty and a British inventor.
(more details HERE
PROFILE - Captain Ettrick William Creak was Superintendent of the
Compass Dept. at the Admiralty. He developed in the 1880's a liquid
compass that worked
better than Sir William Thomson's dry card system but he was
unsuccessful at his attempts to have it chosen as the Admiralty's
Standard Compass because of Thomson's lobby.
Francis Crow was a watchmaker and silversmith of Faversham
(Kent, Great-Britain). He was awarded in 1813 a patent (no. 3,644)
for a liquid-damped compass with a lens-shaped floating card. This
idea was realized only much later (c. 50 years) by the U.S.
Full text of original patent available.
on the image for
an enlarged view)
Complete description of fig. 1 and 2 HERE.
- D -
Go to Dubois & Casse below.
Edward John Dent &
Co. was established in 1814. The company still exists today.
website (www.dentlondon.com) only describes clocks and
watches. See also the Dent-made Air Compass
259 designed by Capt.
. See more examples in the entry
left: Early designs
courtesy of the National Maritime Museum as published in Steady
as she Goes by A.E.
At right: Portable binnacle Pattern 20, 1875
courtesy of J. Clarke - see more pictures in PATTERNS
Click on the image for a view of the compass.
Probably early 20th c.
was in the late 19th and early 20th C. a department
of the Admiralty of the German Imperial Navy Kaiserliche Marine
(see below: Kriegsmarine
and read more
in Wikipedia). Its Second Department
testing of instruments)
was responsible for the testing
of navigation instruments, i.e. also compasses, being thus the
equivalent of the British Superintendent of the Admiralty
of the Royal Navy
. Its official monthly review was Der
to the cover of the Dec. 1939 issue
Today, the responsible authority is the Federal Maritime and
Hydrographic Agency (Bundesamt
für Seeschifffahrt und Hydrographie
in Hamburg. The department in charge of the testing of
compasses is the Magnetkompasslabor
Picture by courtesy of BSH: The
former castle of the Deutsche Seewarte destroyed in 1943
The full history can be read online here Die Geschichte maritimer Dienste in
Deutschland - Das BSH und seine Vorgänger
In short: Germany as a unique country was created in 1871. The various
former agencies like the Seewarte
which had been created on private
initiatives were then united under the authority of the Admiralty in
ministry of the Navy. After World War II and until the end of
GDR (Communist East Germany) in 1989, a service similar to the
existed there, located in Rostock from 1959 on and depending of the
(dredgers, tugs and salvage
Since iron-hulled ships replaced large wooden ones (mid 19th
C.) a correction card
necessary to steer the vessel by taking into account the magnetic
influence of the metallic masses. For pictures of modern
correction cards click HERE
According to the ancient card displayed at
right, the ship would have to steer SW by her compass in order
to make good a course of WSW magnetic (Source: Alan Gurney, COMPASS
on picture at right
The Eugene M. Sherman Company of Seattle designed and manufactured
nautical navigational aides, notably the line of Dirigo gimballed
See also Aeronautical Compasses: SHERMAN
on picture at right
Abel Louis Doignon was a French compass maker located 11, rue
Hoche in Malakoff, Paris / France (see also Marching compasses). He
filed several patents for ships' and aircraft compasses between 1905
and 1928. A special one was no. 539.589 of 1921 concerning the use of
tiny tubes containing Radium salt
(link to pic
attached to the rose to evitate that they be destroyed by the
at r.: compass produced in cooperation with B.B.T.
Mr. D'ONZEMBRAY described in 1731 a system designed to
determine at sea the angle of the wind relative to the compass and the
ship's keel line (Machine
pour connoître sur Mer
l'angle de la ligne du Vent & de la Quille du Vaisseau ; comme
aussi l'angle du Méridien de la Boussole avec la Quille et &
l'angle du Méridien de la Boussole avec la ligne du Vent
(published in 1764 in Histoire de l'Académie des
Sciences). The aim was to optimize the trimming of the many sails. The
device comprises a wind vane with a pointer placed
above the compass card featuring degrees and rumbs (complete descr. available, 5 p.
Dubois & Casse was a French maker of barometers
(link to a
photograph of the
rearside of an instrument, pic. courtesy J. Clarke
in the second
half of the 19th c. The company's logo was made of the initial letters
D and C on either side
of an anchor. (Source: analogweather.com)
PROFILE - Emile Marin DUCHEMIN (who lived 11, rue de la Bienfaisance in
Paris) filed a patent in 1874 for this compass system he
had developed and called BOUSSOLE CIRCULAIRE (circular
was installed in ships for several trials at sea
described in the booklet (iss.
7, 1877, 47 p., photocopy available). It is also listed the
famous German reference book Der
1910). The inventor tried to have his
system adopted by the French Navy and produced many reports from
officers with positive feedback. However, it is highly surprising that
someone clang to this obviously heavy design where the Admiralties of
England and Germany tried to develop the lightest solutions that could
be imagined (compare to the paper rose with magnets hung on silk
threads designed by Thomson
The idea was that the larger the magnet was, the better the stability
of the rose should be. Read also BISSON's patent.
on the picture above for an
enlarged view of the drawing)
Short description together with the drawing on the title page: "an
external magnetized circle (A) is connected with an inner magnetized
circle (B) by means of a bar (C) made of aluminum or another metal. The
magnetization is maximum at the North and South points and diminishes
gradually towards the EAST and WEST points (n-n line)."
Pict. at r.: The magnetic circular needle.
instrument was in very sad condition. Its remains were glued onto a
grip like the religious tool called monstrance. The photographs
were taken at an antiques shop in Paris.
Above - Inscription on either side of the North mark: Boussole Duchemin
Bottom - Inscr. at the southern end: Dumoulin-Froment Constructeur
above for enlarged views -
Pictures courtesy Jaypee)
- Dia.: approx. 250 mm / 10 in.
- Weight unknown
- Inscriptions on the East side:
. inner circle: N° 1616 E.M.D.
. external circle: Emile Marin Duchemin - No. 1616
Patent No. 101,992 (50
p. with additions - copy can be ordered)
above for a view of the corresponding figure 2 of the patent)
NOTE: A complete binnacle is displayed in the Musée de la
Marine, Paris. See pic. in L'Instrument de Marine,
E - F
A Flinders bar is a
vertical soft iron bar placed in a tube on the fore
side of a compass binnacle (see
picture at right, KELVIN
Flinders bar is used to counteract the
vertical magnetism inherent within a ship and is usually calibrated as
part of the process known as swinging the compass, where deviations
caused by this inherent magnetism are negated by the use of horizontal
(or quadrantal) correctors.
It is named after Matthew Flinders (1774-1814) who wrote a
report in 1812 on
ships' magnetism for the British Navy.
the whole story in
by Alan Gurney
PROFILE - Thomas Flint was Mathematical instrument maker, Nautical
instrument maker, Optical instrument maker 9 High Street
(1826-31) and later 31 Whitefriars Gate, then 34 Whitefriars Gate
(1835-48) all in Hull, England. The
instrument at right is a tell-tale
Very unusual is the
west-decorated cardinal point of the rose
of winds. Most cards featured an east-decorated
rose of winds (link to
We suppose that this compass was meant to be used in the Indian Ocean
where Jerusalem lies WEST.
- G -
Transmitting magnetic compass
used in some ships of the Italian Navy in the early 20th c.
The control was provided by a lamp in the bowl which shone through a
semi-circular slot in the card and illuminated a photo-electric cell
above the card, when the latter was in the appropriate position
relative to the bowl, while at other times the light was cut off from
the cell by the solid part of the card.
Source: From Lodestone to Gyro-Compass
(see menue Miscell. /
History & Bibliography).
Acronym of Georg Hechelmann
Nachfolger (successors, see their website: www.gehna.de).
The company no longer produces compasses
but binnacles. Link: pic.
of the last known model.
Pictures courtesy of BSH (click
on the image
for a pic. showing the manufacturer's full name)
System probably invented by Girolamo Cardano
who was among other specialties an Italian doctor and engineer. This
system which was called after him in French and German
la cardan / kardanische Aufhängung
to compensate for the movements of a
vehicle (ship or aircraft) so that the compass card always remains
horizontal (more details in Wikipedia).
Small compasses were also made for other usage.
Examples : pocket
(N & Z), tell-tale
(N & Z),
charm (see picture at right,
copyright TML, click for enlarged view)
Dia. of spherical case: 19.5mm; dia. of mother of pearl card:
11.5mm; weight: 12 g.
/ Gyro syn
A gyroscopic compass is an electrically operated
instrument, controlled and damped either by gravity of electrically so
that the spin axis settles in the meridian. These instruments are not
the object of this museum. The gyrosyn is a remote-indicating compass
system employing a directional gyroscope which is monitored by and
synchronized with signal from an element fixed in azimuth and designed
to sense its angular displacement from the earth's magnetic meridian.
This element, called flux valve or flux gate, is located at
point, e.g. wing tips on aircraft, away from
extraneous magnetic influences. (Source: Chambers Dictionary of
Science and Technology
For a picture go to Anschütz above. For a pic. of a test bench
- H -
- HANSEN BEARING BOARD
(see picture at right):
go to PELORUS
PROFILE - Leendert Johannus HARRI (born 1799) was a Dutch
maker in Amsterdam. His family (glass maker) came from a place
near Venice (Italy) to Holland in 1730. The company (see
known for its instruments, marine charts and literature.
Dia.: approx. 5" (125mm)
Height (with lid): approx. 4 ¾ " (120mm)
Dia. of compass card: 4" (100mm)
PROFILE - W. HARTMANN, compass maker located in Hamburg 11. Some
compasses are marked GEHNA (see Hechelmann below) and also NAUTICA. No
Pictures courtesy of BSH.
- Former German compass maker of Hamburg (successor: GEHNA
, website www.gehna.de) who
23.503, 1874) an improved
design of a paper
rose with magnets hung on silk
threads (see pic. below). He worked in his own shop
from 1.10.1878 on until probably 1905 (source: Feinmechanik
und Optik in
Gert Behnke, 2011). A comprehensive description was published in the
entry for Kompass
in the great German encyclopedia MEYER's Konversationslexikon
is also described in the reference books Der
Kompass an Bord
, 1906) and Der
(Schück, 1911). His competitor C.
also tried in vain to have his own system supported by the Admiralty of
the Imperial Navy (Kaiserliche Marine).
on images for enlarged views)
Compass made at about the same time as the brigg
Ausguste* built in Wismar
(Germany) in 1840.
Full name around pivot cap in center: Georg Hechelmann Nachf.
(G.H. successor). "Vorsetzen 15" is the shop's address in
in the city museum of
Wismar - Picture courtesy
Logo (G.H.) in the fleur de lys
Fig.: patent 1874
PROFILE - Petter HOLM was a compass maker located in Copenhagen,
Dennmark (Kjöbenhavn). Several instruments are known.
The webster database Adlerplanetarium indicates for his birth and death
dates 1696-1776. His nationality is unclear: he appears in Sweden,
Dennmark and Holland as maker of tide tables, calenders etc.
He is also said to have headed a navigation school.
We know a compass made in the late 18th c. (repaired in 1804) and a
drawing published in
(A. Schück, 1911, see Miscell. / Hist.
& Bibliogr.). This latter one is signed by RASM. ANDR. HOLM.
Its short description
the rose's colours (white on black ground) and where it is
kept (K.I.M. = Königliches
Institut für Meereskunde, Royal Inst. for the sciences of the
courtesy Uwe Münch)
Dia. x height: 145 x 120mm
Magnet: two under the rose
Date: late 18th c. (repair mention inside: 1804 and Rostock 1817, Evers)
de lys on a rose signed by Rasmus Andr. Holm
(a son of Petter?).
Inscription on the 'strap': ANGELO.
The East decoration is also different.
Kompass, tabl. 20
In 1926 S. L. HOLMES developed a successful transmitting
magnetic compass (TMC)
using the principle of the Wheatstone
bridge. It was produced together with BENDIX (Pic. at r. courtesy
INVALUABLE - The instrument is marked E.S.Ritchie Sons Inc. 91270. 1920
Patent. Dim.: H: 6.5": W: 11.5": D: 11.5")
Read the functional description in From Lodestone to Gyro-Compass
(see menue Miscell. /
History & Bibliography).
PROFILE - Former French company (more information HERE
Henri Isidore Houlliot and VION
were friends and decided not to compete.
VION built the big ship compasses while the small ones
were manufactured by Houlliot.
See also pocket compasses and DESOMBRE
scope (published in the catalogue
of the Industrie
Française des Instruments de
(130 x 84 mm)
on img. for
(was offered in the 1932
catalogue of the
Société des Lunetiers (S-L)
- Card dia.: 30* - 120 mm (* see pocket compasses)
- Henry Hughes was born in 1816 (read all available info HERE
Most HUSUN compasses are aircraft compasses but this one seems to have
been designed for ships. Astonishingly the S for south is
inverted, which means it was to be read in a mirror or a prism like the
compasses. The patent no. refers to the Campbell
& Bennett invention.
Pictures courtesy of Dánial K.
on the images for enlarged views
Dimensions (height x dia.): 105 x 255mm
Divisions: rhumbs on both side plus degrees on underside
Marking DEAD BEAT = aperiodic compass (check this word in the section
NOTE: On the compass card with no figures, the letter S (South) is
printed inverted. This means that this side should be located below the
compass to be observed in a mirror. Maybe the compass was dismantled
and reassembled erroneously after a maintenance or repair.
- I -
Laurie Norie &
Wilson Ltd London
PROFILE - This manufacturer apparently makes now only charts. His story
is told in the
Makers of the Blueback
History of Imray
Norie & Wilson Ltd
Susanna Fischer, 2001. Actual website: IMRAY
Menno Koper (Click
on the images for
- Card dia.: mm
- Age: mid 19th C.
- J -
Japanese compasses were divided into 12 areas. Scroll upward to CHINA
for more details.
Picture courtesy of BSH
In 1863 F. Jenkin patented a transmitting
magnetic compass (TMC)
system in which a contact attached to
the card wiped one or other of a hundred contacts spaced around the
bowl. From each of these contacts a wire led away to the repeater, in
which a pivoted needle was placed in the center of a circle of 100
electro-magnets, one of which was energized when its contact was
touched by that on the compass card. The repeater needle, of course,
aligned itself with whichever electro-magnet was energized, so that the
repeater followed the indications of the compass. Compare to BISSON's
Source: From Lodestone to Gyro-Compass (see menue Miscell. /
History & Bibliography)
PROFILE - Lieutenant Edward J. Johnson was the 1st Superintendent of
Compasses at the British Admiralty from 1842 until his death
- K -
- The Dutch Prof. Kaiser designed in 1892 a compass rose featuring a
circular magnetic needle attached to the cap via tubes. It was later
improved by the German SCKELL who replaced the tubes with chains.
Compare to the French DUCHEMIN's rose.
on picture at right
view and details of patent
Ltd was formed in 1947 by the merger between
the scientific instrument manufacturing firms of Henry Hughes
Ltd, London, England, and Kelvin
Bottomley & Baird Ltd, 16 and 20 Cambridge Street
Scotland. The logos of one of the preceding companies (White,
consisted of the three initials WBT
placed on a black & white
graphic resembling the yin-yang
symbol (s. WBT in the section Wrist Compasses and pic. at
Wikipedia - "Kelvin Hughes" and on the
Sir Wm. Th. Lord Kelvin of Largs) was a physicist. He invented a famous
binnacle with a compass deviation correction system. He is also
famous for the compass card he designed in 1876 (patent no. 1339)
360°-scale on the circumference in addition to the conventional
rhumbs. It was standard in
the Royal Navy although the superiority of liquid-dampened compass
card was soon proven and adopted in the U.S. and
Navies (read the full story in Compass
by A. Gurney and in Steady
as she goes
by A. E.
Fanning). Both German manufacturers C.
developed their own version of this system.
Thomson wrote a
document entitled Terrestrial Magnetism and the
also was partner
in several companies which built the compasses he designed.
See also below, the booklet "Instructions
for the adjustment
The original light-weight
compass card had eight
magnet needles (M, see drawing at left below) but a later model improved to prevent
of the compass by the engines, or by the firing of guns
(patent no. 4923, 1889) possessed even 14 (pict. below at right)! The
and the graduated rim
with 32 silk threads (S) attached to the cap.
More details and pictures in Land
& Sea Collection
KATAV-IVANOVSK INSTRUMENT-MAKING PLANT,
JSC ( Катав-Ивановский приборостроительный завод ) is a Russian
manufacturer located in
Katav-Ivanovsk, 456110 Chelyabinskaya oblast, Katav-Ivanovsk, ul.
Karavaeva 45 and producing a large scope of nautical and
The compass at right is a common Russian naval system for calibrating
naval compasses. The name is "Инклинатор И" (Inklinator 'I'. Each ship
own magnetic field and a compass must be calibrated for it. But the
field direction is not only horizontal - it has vertical part. When a
ship moves to
different places, the vertical component can vary and the change of the
part of Earth magnetic field can be very important.
A compass for
"everywhere-use" must be calibrated for its own ship magnetic field not
only for the horizontal, but also for the vertical part. For this
calibration, big (main) ship compasses have something alike steel bolts
(magnetic). Original descr. on the manufacturer's website: "Инклинатор
"И" для измерения угла наклонения вектора магнитного поля.
Используется при девиационных работах. Применяется для типов компасов
КМ 100, УКПМ-М, КМ 145.
Производители/поставщики: ЗАО «Катав-Ивановский
This designation refers to the German Navy after 1935 (see note). When
Germany was united to form an empire in 1871, it was called Kaiserliche Marine
(Imperial Navy). The compasses used on-board the German warships
featured a symbol representing the state, i.e. the imperial
or the nazi cross (swastika) and the letter M
The number is the catalogue reference similar to today's NATO
Note: After 1918, Germany was not allowed to have military
PROFILE - Kuhlmann
(link to this company's website) was created in 1903 in
(Germany). This instrument used during WW1 to compute the launch angle
of torpedos is called in German Angriffsscheibe
(attack course finder disc).
Pic. at r. © A. Uhler. See also the same instrument
made by STEGER
of which we have better quality pics.
Dimensions of the case: 7 1/8
x 13 ¾ in. - 18x32cm