Mahi
Navy Auxiliary Vessel · United States · Lost 1982 · The Hawaiian Islands
A former Navy vessel deliberately sunk off Waianae as an artificial reef, now one of Oahu's most popular wreck dives, patrolled by eagle rays.
The Vessel and Her Loss
Mahi was a Navy auxiliary vessel that was decommissioned and later sunk deliberately off Oahu's Waianae coast to create an artificial reef. She now rests upright in about 90 feet of water, her structure encrusted with coral and frequented by eagle rays and reef fish. Storm damage over the years has collapsed parts of her main deck.
Vessel
- 1945
- Not established
- Not established
- Steel
- 176 ft
- Not established
- Not established
- Diesel, single screw
- United States Navy, later private artificial reef program
Loss
- January 1, 1982
- Intentional sinking
- Off Waianae, west coast of Oahu
- Pacific Ocean
- Not established
- Not established
- Not established
- Not established
- Not established
The Wreck Today
- 65-90
- Resting upright, coral-encrusted, with sections of the main deck collapsed from later storm damage.
- Not established
- Not established
- Not established
Position
- 21.42° N 158.23° W
- Approximate position
- Waianae, Oahu
Exact sinking year is inconsistently reported across dive operator sources.
Evidence
Overall confidence: Partially documented (55/100)
Exact build year, original hull designation, and precise sinking date vary across dive-industry sources and are not firmly established.
Wreck depth, condition, marine life.
PADI Dive Site Directory
Sinking date and site description.
