▁beam ▁of ▁, ▁and ▁a ▁maximum ▁dra ug ht ▁of ▁. ▁Main ▁prop ulsion ▁mach in ery ▁consisted ▁of ▁two ▁M T U ▁series ▁ 5 3 8 ▁dies el ▁engines , ▁which ▁supplied ▁ ▁to ▁the ▁two ▁prop eller ▁sh aft s . ▁Ex ha ust ▁was ▁not ▁exp elled ▁through ▁a ▁fun nel , ▁like ▁most ▁ships , ▁but ▁through ▁v ents ▁below ▁the ▁water line . ▁The ▁pat rol ▁boat ▁could ▁reach ▁a ▁maximum ▁speed ▁of ▁, ▁and ▁had ▁a ▁maximum ▁range ▁of ▁ ▁at ▁. ▁The ▁ship ' s ▁company ▁consisted ▁of ▁ 2 2 ▁personnel . ▁▁ ▁Each ▁pat rol ▁boat ▁was ▁armed ▁with ▁a ▁single ▁ 4 0 ▁mm ▁B of ors ▁gun ▁as ▁main ▁arm ament , ▁supp lement ed ▁by ▁two ▁. 5 0 ▁cal ▁Brow ning ▁mach in eg uns ▁and ▁an ▁ 8 1 - mm ▁mort ar , ▁although ▁the ▁mort ar ▁was ▁removed ▁from ▁all ▁ships ▁som etime ▁after ▁ 1 9 8 8 . ▁The ▁main ▁weapon ▁was ▁originally ▁to ▁be ▁two ▁ 3 0 - mm ▁guns ▁on ▁a ▁tw in - mount , ▁but ▁the ▁re condition ed ▁B of ors ▁were ▁selected ▁to ▁keep ▁costs ▁down ; ▁provision ▁was ▁made ▁to ▁install ▁an ▁updated ▁weapon ▁later ▁in ▁the ▁class ' ▁service ▁life , ▁but ▁this ▁did ▁not ▁event uate . ▁ ▁W oll ong ong ▁was ▁laid ▁down ▁by ▁North ▁Queensland ▁Engine ers ▁and ▁Ag ents ▁( N Q E A ) ▁on ▁ 2 3 ▁July