Yacht service at your Seattle slip
Steadfast Marine Systems is based in Seattle, and the work happens where the boats are. Our technicians service yacht air conditioning, refrigeration, and electrical systems at the vessel’s slip, across the city’s principal marinas.

Steadfast Marine Systems provides dockside yacht air conditioning, refrigeration, and electrical service at Seattle marinas including Lake Union, Westlake, Eastlake, Elliott Bay, and Shilshole Bay. The owner-operated company services vessels 52 to 200 feet at the slip, offers emergency and after-hours response, and is expanding across Puget Sound.
Where we work
Five Seattle moorages, one standard of work at the slip.
Lake Union
Freshwater moorage in the heart of the city; systems here run year-round, and so do we.
Westlake
The lake’s western shore, freshwater slips and busy working docks; we stage tools and parts to keep the finger piers clear.
Eastlake
The quieter eastern shore of Lake Union; fresh water is gentle on cooling circuits, and routine service keeps it that way.
Elliott Bay
Saltwater moorage on Puget Sound, close to downtown; salt air works on shore-power connections and condensers, so our inspections start there.
Shilshole Bay
Saltwater slips near the Ballard Locks, with true Sound exposure; corrosion shows up early here, and we look for it before it costs you.
Your moorage not listed?
We are expanding across Puget Sound — Tacoma, Gig Harbor, Poulsbo, and Bremerton. Call (253) 000-0008 and ask.
- Yacht Air Conditioning & Climate Control — Chilled-water and self-contained air conditioning serviced at your Seattle slip, kept honest through humid summers and long damp winters.
- Marine Refrigeration — Galley refrigeration, freezers, ice machines, and wine storage serviced dockside, with EPA Section 608 certified refrigerant handling.
- Yacht Electrical — Shore power, distribution, inverters, batteries, and controls checked and corrected at the dock, without moving the vessel.
- Emergency & After-Hours Service — Emergency and after-hours response across Seattle’s marinas when a system quits at the wrong time.
Based here
We are Seattle-based, so the distance between your call and a technician on your dock is short. The company is owner-operated; the people who answer for the work are the people who do it. And because service happens at your slip, your vessel stays where she is.
We are expanding across Puget Sound, with service reaching toward Tacoma, Gig Harbor, Poulsbo, and Bremerton.

Questions, answered
- Which Seattle marinas do you serve?
- We provide dockside service at Lake Union, Westlake, Eastlake, Elliott Bay, and Shilshole Bay. Service happens at the vessel’s slip, so there is no need to move the boat. We are also expanding across Puget Sound toward Tacoma, Gig Harbor, Poulsbo, and Bremerton.
- How quickly can you get to my vessel in Seattle?
- We are based in Seattle, so travel to any of the city’s marinas is short. Scheduled work is set around your calendar and your crew’s. For urgent failures, we offer emergency and after-hours response; call (253) 000-0008 and we will tell you plainly when we can be at the dock.
- Do you handle after-hours emergencies in Seattle?
- Yes. Emergency and after-hours response covers air conditioning, refrigeration, and electrical failures. We come to the slip, stabilize the system, and follow up with a documented repair plan for your captain or engineer.
Service at your Seattle slip
Tell us the marina, the slip, and the symptom. We confirm a time with your captain or engineer and arrive with what the job needs.