A full service instrument shop specializing in sales and service of marine compasses. Suppliers of genuine replacement parts for Danforth, Aquameter, Ritchie, Kelvin White, Dirigo and Star compasses

Click to enlarge

6" Danforth, Kelvin-White Constellation Parts

Originally designed in 1947 by Wilfrid Gordon White of the Kelvin White Co., the Constellation compass series was available in 5,6,7 and 8 inch "apparent card" sizes.The Kelvin White Co. became the Wilfrid O. White and Sons Company which was sold to Danforth in 1961. Danforth added a 4 inch Constellation to the line. Danforth was sold to Rule Industries in the 1980's. Rule Industries added a 4-1/2" Constellation to the line. The Constellation compasses are still made to this day.

To determine which size compass you have, measure the diameter of the clear dome. The Clear dome on the 6" Constellation measures 6-3/8" in diameter.The 6" Constellation compass takes approximately 70 ounces of compass oil to fill. Click on the schematic to enlarge the diagram. The key number in the diagram is the first number of the item number.


6"  Compass Oil Pack6" Compass Oil PackTwo quart containers and one pint container of Ritchie Compass Oil, Enough Oil to fill the 6" Ritchie Globemaster or the 6" Danforth Constellation.

6G-0000Regular price: $62.00Sale price: $58.00
Dial assemblyOld style jewel posts with a straight shaft only are no longer available. All 6" dials come with new style jewel posts which are threaded on the bottom. They will retrofit easily to the old style.

1-A10045SA$220.00Dial Graduations:  Jewel post type: 
Click to enlargePivot w/ retainer "A"Used in Old Style 5",6",7",8" Constellations

Click to enlarge6" Card (4-1/8" diameter) At this time The 6" dial is available in the 5 degree style only.

3-A10035$44.00Dial Graduations: 
Click to enlargeJewel W/PostThe original style jewel post is a straight post only and is inserted into a threaded bushing, that style is no longer available. It was replaced with this version that is a one piece jewel post with bushing.

6" Magnet and Frame ("Frog") 5-A9514$38.00
Click to enlargeRetainer-B
Gimbal PanWe do have some old style gimbal pans available, however old style gimbal rings are no longer available, the bowl will have to be modified to accept a new gimbal assembly if the ring is broken

6" Gimbal RingThe 6" gimbal ring is no longer available, if a replacement is needed we can modify the older bowl to accept the new style 6" gimbal and pan assembly

Click to enlargeScrew, Light Retaining (4-40 flat head)
Click to enlarge6" Low Level Light Assembly (12 Volt)The low level light has been discontinued and replaced with an LED kit see the Danforth lighting page for details

Click to enlargeLight Retaining Bracket
Click to enlargeScrew, Top Bezel Ring Retaining (6-32 Flat head)
Click to enlargeO-Ring
Click to enlargeDomeThe 6" dome measures 6-5/16" in diameter at the base.

Click to enlargeScrew, Light Bracket Retaining (4-40 fillister head)
Gimbal Ring and Lubbers Line Pan AssemblyThe 6" Gimbal rings are no longer available. Replacement will require the bowl and jewel post be adapted to accept a newer version of the 6" gimbal and pan assembly. We do have gimbal pans without rings in stock

Click to enlargeFiller Plug gasketThis filler plug gasket is used on 6 of the Constellation compasses. 4"(Key#29), 5" old style(Key#27), 5" New Style(Key#30), 6"(Key#27), 7"(Key#27), and the 8" Constellation

Click to enlargeFiller Plug (Brass)
Click to enlargeDiaphram , Expansion (4" diameter) Used on 5" and 6 " Constellations6" Constellations made prior to approximately 1980 used a larger Diaphram (4.5" in diameter)

Click to enlargeExpansion Diaphram 4-1/2" diameter (used on Danforth and Kelvin White 6" Constellations made prior to 1980

This Diaphram measures 4-1/2" in diameter, used on Wilfrid O White, Kelvin White and Danforth 6" Constellations made prior to 1980. Measure the old diaphram (out of the compass) before ordering

Temporarily out of stock

Click to enlargeExpansion Retaining Screw (6-32 fillister head)
Click to enlarge Expansion Retaining Ring (5" Old Style & 6" New Style)This diaphram retainer is used on the old style 5" Constellations as well as the new style 6" Constellations that have a 3-7/8" diaphram

GETTING YOUR COMPASS REPAIREDGETTING YOUR COMPASS REPAIREDViking Compass Repair Service specializes in marine compass repair. We repair compasses manufactured from the early 1800's to present day marine compasses.

We are an authorized warranty repair station for most compass manufacturers, including but not limited to E.S.Ritchie, Danforth, Rule, C. Plath. We also repair compasses by: Aquameter, Star Compass Co, Marine Compass Co., Dirigo, Wilfrid O. White and Sons, Kelvin White, Wilcox Crittendon, John Bliss, Baker Lyman, Lionel

In January 2010 Viking Instruments purchased the entire inventory of Danforth and Aquameter compass parts as well as the tooling necessary to continue manufacturing replacement compass parts. Viking Instruments is the exclusive manufacture and distributer of Danforth and Aquameter compass parts and service.

If you are interested in getting an estimate to repair your compass. Pack it up carefully and ship it to;

Viking Instruments, Inc.

182 Summer St #158

Kingston MA 02364

Please be sure to include your name, address and phone number with the compass. We will contact you via telephone or email within 2-3 working days from receipt of your compass.

Most current production compasses can be repaired and be ready for return shipment less than two weeks of the date of customer approval.

If you wish to speak to someone in our shop concerning your compass you may call 781-585-2100 Monday- Thursday From 9:30-4:30 E.S.T.