inspection of draft mark and loaded water lines
draft guage [= draft indicator]
clear mark [= clearing mark]
End-of-Tape Mark (EOT Mark)
tidal bench mark [= tidal mark]
adjust the ship’s draft
adjustment of the ship’s draft
aerating test to draft tube
air draft
气流
吸风
通风
抽风
净空高度
空气通风
水上高度
净空高度水上高度
水线到舱口围顶的距离
air draft operation automation