- ton ▁Mac G reg or ▁c rane ▁with ▁active ▁he ave ▁compens ation . ▁The ▁vessel ▁can ▁also ▁be ▁equ ipped ▁with ▁an ▁optional ▁ 1 2 0 - ton ▁A - frame . ▁The ▁ ▁a ft ▁deck ▁can ▁be ▁used ▁for ▁various ▁purposes ▁and ▁the ▁ship ▁has ▁a ▁ ▁moon ▁pool ▁for ▁under water ▁operations . ▁In ▁addition ▁the ▁ship ▁has ▁a ▁hel ip ad ▁and ▁accommod ation ▁for ▁ 4 5 – 4 7 ▁workers ▁in ▁addition ▁to ▁the ▁ship ' s ▁crew , ▁which ▁is ▁increased ▁from ▁ 1 9 ▁to ▁ 2 3 ▁during ▁the ▁summer ▁season . ▁Since ▁Bot nica ▁acts ▁as ▁an ▁esc ort ▁ice bre aker ▁during ▁the ▁winter ▁season , ▁she ▁is ▁also ▁equ ipped ▁with ▁a ▁ 2 1 0 - ton ▁Aqu am aster - R a uma ▁to wing ▁win ch ▁and ▁stern ▁not ch ▁for ▁assist ing ▁merchant ▁ships . ▁The ▁ob lique ▁bridge ▁maxim izes ▁visibility ▁from ▁the ▁star board ▁side ▁ste ering ▁position . ▁ ▁Power ▁and ▁prop ulsion ▁▁ ▁Bot nica ▁is ▁power ed ▁by ▁six ▁engine - generator - engine ▁sets ▁consisting ▁of ▁twelve ▁ ▁C ater p ill ar ▁ 3 5 1 2 B ▁V 1 2 ▁high - speed ▁dies el ▁engines , ▁each ▁with ▁an ▁output ▁of ▁, ▁driving ▁six ▁A BB ▁gener ators . ▁The ▁ship ▁was ▁originally ▁designed ▁for ▁six ▁bigger ▁W är ts il ä ▁generating ▁sets , ▁but ▁the ▁lower ▁initial ▁ac quisition ▁cost ▁of ▁the ▁C