Ocean Alexander 390 Sundeck Yacht Search Stock & Used Yachts The 390 Sundeck is a flybridge boat from American builder Ocean Alexander. Constructed from GRP, the 390 Sundeck has a planing hull design and a top speed of 21 knots. Read More Specs Length 11.96m Materials GRP Hull & Superstructure Show Full Specs Hide Full Specs Full Specification Principal Characteristics Length overall 11.96m Beam 4.24m Draft (full load) 0.97m Fuel capacity 1,136 Litres Fresh Water capacity 568 Litres Black water capacity 68 Litres Max speed 21 Knots * Cruising speed 17 knots * Hull GRP Superstructure GRP Engines & Performance Standard Option Cummins QSM11 300mhp QTY x 2 Performance 295 HP (220 Kw) each @ 1800 rpm Maximum Speed - Engine Details Compare Option #2 Lehman Super 275 QTY x 2 Performance 275 HP 275 HP (275 Kw) each @ 2500 rpm Maximum Speed - Option #3 Detroit Diesel 6V-71 N70 QTY x 2 Performance 250 HP (187 Kw) each @ 2300 rpm Maximum Speed 21 knots Engine Details Option #4 Volvo Penta TAMD61A QTY x 2 Performance KW only available 302 HP +7HP (225 Kw) each @ 2800 rpm Maximum Speed 21 knots Engine Details Compare Engine Options * Depending on engine option Show Full Specs Hide Full Specs