HBMS: His/Her Britannic Majesty's Ship
HDMS: His/Her Danish Majesty's Ship
HIJMS: His Imperial Japanese Majesty's Ship
HLV: Heavy Lift Vessel
HM: His/Her Majesty's
HM Sloop: His/Her Majesty's Sloop
HMAFV: His/Her Majesty's Air Force Vessel
HMAS: His/Her Majesty's Australian Ship
HMAV: His/Her Majesty's Army Vessel
HMB: His/Her Majesty's Bark
HMBS: His/Her Majesty's Bahamian Ship
HMBS: His/Her Majesty's Barbadian Ship
HMCS: His/Her Majesty's Canadian Ship
HMHS: His/Her Majesty's Hospital Ship
HMIS: His/Her Majesty's Indian Ship
HMM: His/Her Majesty's Monitor
HMMGB: His/Her Majesty's Motor Gun Boat
HMNZS: His/Her Majesty's New Zealand Ship
HMPNGS: His/Her Majesty's Papua New Guinea Ship
HMS: His Majesty's Ship
HMS: His/Her Majesty's Ship/Submarine
HMSm: His/Her Majesty's Submarine
HMSML: His/Her Majesty's Small Motor Launch
HMSTC: His/Her Majesty's Sail Training Craft
HMT: His/Her Majesty's Tug
HMTSS: His/Her Majesty's Tuvaluan State Ship
HMVS: His/Her Majesty's Victorian Ship
HMY: His/Her Majesty's Yacht
HNLMS: His/Her Netherlands Majesty's Ship
HNoMS: His Norwegian Majesty's Ship
HS: Hellenic Ship
HSC: High-Speed Craft
HTMS: His Thai Majesty's Ship
HTV: Heavy Transport Vessel