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 enlarge4" Danforth Constellation (1978-1998) Repair

The 4" Danforth Constellation was manufactured from the late 1970's until the late 1990's. It was available in a flush mount, bulkhead mount, bracket nount and a binnacle mount known as the 4" Express. Most of the more commonly needed parts are still available for this compass. You can purchase parts from Viking Instruments online or you can send your 4" Constellation in to us for a complete restoration, backed by our exclusive 2 Year Warranty.

In January 2010 Viking Instruments purchased the entire inventory of Danforth compass parts as well as the tooling necessary to continue manufacturing replacement compass parts from Rule Industries. Viking Instruments is now the exclusive manufacturer and distributer of replacement Danforth compass parts

The standard overhaul on the 4" Constellation is $168.00, which includes complete disassembly, cleaning, powder coating the top ring, replacement clear dome, gaskets, diaphram, oil and a two year warranty. Replacement parts to the gimbals, lighting and return shipping are extra. Turn around time is typically two weeks from the time that we receive your approval to proceed. Be sure to include a daytime telephone number in the box with the compass so we can contact you as soon as your compass arrives.


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Danforth 4" Constellation PartsDanforth 4" Constellation Parts
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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. 41 Summer St 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 9:30-5:00 E.S.T.

Our Our retail Store is open Monday, Tuesday and Thursday 12:00-5:00