Open every weekend durning the Dive season. 
New Equipment
We have access to the latest BCD's, Regulators, Computers, Masks, Fins, Wetsuits, Drysuits and accessories from manufactures such as Scubapro, Sherwood Scuba, TUSA, Aeris, XS Scuba, Akona, OMS  BARE and O'Neill.

Equipment Service and Repair

Is your equipment due for its yearly servicing? Have a free flow problem you need fixed? Let our fully certified technicians help you maintain your valuable equipment the right way. We stock a complete line of all replacement parts for quick service. All repairs are handled on a timely basis.

Air Fills
Four Fathoms provides you with clean, oxygen compatible air fills. Nitrox fills  are done by a certified blending technician. We stock a large quantity of 80 cubic foot tanks in our rental department.

Rental Equipment
Don't own gear yet ? No problem, we have a full rental department including BCD's, Regulators, Wetsuits, and Tanks. Our equipment is well maintained and ready to dive.


Four Fathoms - 7320 Main Street - Port Sanilac, MI 48469