HA - Hatch

HBF - Harmless bulk fertilizer

HDWTS - Half despatch working time saved

HDWTSBE - Half despatch working time saved both ends

HHDW - Heavy handy deadweight (scrap)

HFO - Heavy fuel

HL - Heavy lift

HO or HO/HA - Hold (Cargo hold) or hold/hatch

HMS - Heavy metals scrap

HR or HRS - Hours

HSS - Heavy grains, soybeans & sorghums

HULL - The main body of the ship

H+M - Hull and Machinery

HW - High water