A.National Geospatial-Intelligence Agency B.Coast Guard C.Naval Observatory D.National Ocean Service
A.soft clay B.hard mud C.very soft mud D.sand
A.without losing the rhythm of respiration B.only with the help of two other people C.by not stopping the respiration for more than 5 minutes D.at ten minute intervals
A.DEFE B.DE C.DS D.DES
A.length between the perpendiculars B.length along the waterline C.length overall D.registered length
