Judging by the pattern of the name on the stern, this would be the "GEN Frank S. Besson, Jr.".

Frank S. Besson Class LSV Logistic Support Vessel, USA
Crew 6 officers, 24 crew
Dimensions
Length 272.75 feet
length between perpendiculars 256.8 feet
Beam, maximum moulded 60 feet
design draft, moulded 12 feet
beaching draft, forward maximum 4 feet
beaching draft, aft maximum 4 feet plus 1/30 gradient
Slewing maintains a right angle with the beach in a 4 knot cross current
Displacement 4,199 long tons
Propulsion
main engines two emd 16-645E2; 1,950 hp at 900 rpm
reduction gear reintjes wav 2240 2240, 3.5:1
bow thruster schottel S-152; 250 hp
ship service generator two cat 3406; 250 kW
emergency generator cat 3304; 99 kW
Performance
Speed 11.6 knots
Range 8,358 nautical miles
Endurance minimum 38 days, fresh water, chill, freeze and general stores
Cargo
clear deck area 10,500 square feet
total dead weight at design draft 2,864 short tons
cargo dead weight (vehicles, containers etc.) at design draft 2,279 short tons
Services
air conditioning 30 ton chilled water system
Watermaker 2 sweetwater 1,000 gallons per day
potable water capacity 122 long tons
salt water capacity 1,631 long tons
fuel oil capacity 524 long tons

A U S Army "Besson"class LSV (logistic support vessel)probably from Ft.Eustis,Va. or Curtis Bay,Md.