In the period 1958-1963 were 20 T-43 class minesweepers rebuilt at radar picket ships T-43-AGR-class in two versions. The No. 61 was of the second version fitted out with Big Net radar aft fitted on a heavy four-legged mast. Displacement 500 tons standard and 610 tons full load with as dimensions 58,5 x 8,5 x 2metre. The diesel engines provided 2.200 hp allowing a speed of 17 knots maximum. With a fuel capacity of 60 tons they had a range of 2.000 nautical miles at a speed of 11 knots. The crew numbered 77 men. Armed with 2x2 37mm anti aircraft guns and 1xx 25mm anti aircraft guns.
