Karlshamns Tugboat Delta is a tug-type ASD, Azimuth Stern Drive which
means conventional propellers mounted in nozzles that can be rotated 360
degrees to provide thrust in any direction without a rudder. Such a structure
is commonly called Z-drive. The name Z-drive comes from the axis from the
engine is horizontal, through-hull is it vertical, then it is horizontal at the
propeller hub, axle configuration resembles a Z.
The Tugboat Delta is for our conditions a sharp piece
The tugboat Delta is on 329 brutto register tons and it has two diesel engines
totally 3600 horsepowers, 26.5 MW, providing a thrust of 45 tons. "Length
28m, beam 9.8m and draught 4m.