What Goes 50 MPH and Weighs 3,400 Tons?

It has room for plenty of rod holders. I wonder what kind of gas mileage it gets? It drafts a little too much for me, though.

USS Milwaukee

Class & type: Freedom-class littoral combat ship
Displacement: 3,500 metric tons (3,900 short tons) full load[3]
Length: 378.3 ft (115.3 m)[1]
Beam: 57.4 ft (17.5 m)[1]
Draft: 13 ft (4.0 m)[1]
Propulsion: 2 Rolls-Royce MT30 36 MW gas turbines, 2 Colt-Pielstick diesel engines, 4 Rolls-Royce waterjets
Speed: 45 knots (52 mph; 83 km/h) (sea state 3)
Range: 3,500 nmi (6,500 km) at 18 knots (21 mph; 33 km/h)[4]
Endurance: 21 days (336 hours)
Boats & landing
craft carried: 11 m RHIB, 40 ft (12 m) high-speed boats
Complement: 50 core crew, 75 with mission crew (Crews rotate through hulls)
Sensors and
processing systems:
EADS TRS-3D C-band radar
X-Band Navigational Radar
S-Band Navigational Radar
Electronic warfare
& decoys:
WBR 2000
Super RBOCs
Nulka decoy launchers
Armament:
1 x BAE Systems Mk 110 57 mm gun
1 x RIM-116 Rolling Airframe Missiles
4 x .50-cal guns
Mission Modules
Aircraft carried:
2 MH-60R/S Seahawks
MQ-8 Fire Scout
Notes: Electrical power is provided by 4 Isotta Fraschini V1708 diesel engines with Hitzinger generator units rated at 800 kW each.