A.engaged in underwater construction B.under sail and power C.a pilot vessel D.trawling
A.three black shapes in a vertical line; the highest and lowest are balls,and the middle one is a diamond B.three shapes in a vertical line; the highest and lowest are red balls,and the middle one is a white diamond C.three black balls in a vertical line D.two black balls in a vertical line
A.not under command B.engaged on pilotage duty C.restricted in her ability to maneuver D.engaged in fishing