Here's the scoop on the wooden minesweepers- 14 Avenger class in
service:
Displacement: 1,360-1,440 tons full load
Dimensions: 224.25 x 39 x 11.25 feet/68.35 x 11.9 x 3.4 meters
Propulsion: 4 diesels, 2 shafts, 2,600 bhp, 13.5 knots
Crew: 81
Sonar: SQQ-32 mine detection
Armament: 2 12.7mm MG
Concept/Program: Large, highly capable multirole minesweepers/hunters,
capable of overseas deployment. They have suffered numerous technical
problems, some of which remain unresolved, and it is reported that
maintenance is being badly underfunded. Four are based overseas, the
others in Texas.

Builders: Peterson Builders, Sturgeon Bay, WI; Marinette Marine, WI
(MCM 2, 4, 7).

Design: Wooden-hulled minesweepers of relatively conventional design,
equipped with modern hunting/sweeping systems. Carry the SQQ-32
minehunting sonar, Mk116 mine neutralization system with 2 SLQ-48
minehunting devices, SLQ-37(V)3 magnetic/acoustic sweep array, SLQ-38
mechanical sweep, and mine disposal divers.

Number Name Year FLT Homeport Group
Notes
MCM 1 Avenger 1987 ATL Ingleside MCMRon2 NRF
MCM 2 Defender 1989 ATL Ingleside MCMRon2 NRF
MCM 3 Sentry 1990 ATL Ingleside MCMRon2
NRF
MCM 4 Champion1991 ATL Ingleside MCMRon2 NRF
MCM 5 Guardian 1989 PAC Sasebo MCMRon1/PhibRon11
MCM 6 Devastator 1990 ATL Ingleside MCMRon2
MCM 7 Patriot 1991 PAC Sasebo MCMRon1/PhibRon11
MCM 8 Scout 1990 ATL Ingleside MCMRon2
MCM 9 Pioneer 1992 ATL Ingleside MCMRon1 NRF
MCM 10 Warrior 1992 ATL Ingleside MCMRon3 NRF
MCM 11 Gladiator 1993 ATL Ingleside MCMRon3 NRF
MCM 12 Ardent 1993 PG Bahrain MCMRon3
MCM 13 Dextrous 1994 PG Bahrain MCMRon3
MCM 14 Chief 1994 ATL Ingleside MCMRon2

Also, it's not federal but the state of New Jersey operates an old
wooden buoy tender, about 75-80 ft. There are a lot of state marked
channels in the coastal rivers and bays and off the ICW.