Return to Main Abbreviations Page

Marine Abbreviations - Onboard H to Z

A Seadolby Reference Page



HA Hatch

HBF Harmless Bulk Fertilizer

HFO Heavy Fuel Oil

HHP High Holding Power (Anchors)

HHP High Holding Power (Anchors)

HO Hold

HO Heavy Oil

HO Hydraulic Oil

Hsng Housing

Hyd Hydraulic

IBCS Integrated Bridge Control System

IFO Intermediate Fuel Oil

IGS Inert Gas System

LAN Local Apparent Noon

Lat. Latitude

LBP Length Between Perpendiculars

LBS Lifeboat Stations

LCKR Locker

LDT Light Displacement Tonnage

LF Summer Fresh Water Load Line

LO Lubricating Oil

LOA Length Over All

LSA Life Saving Appliances

LW Low Water

LWL Low Water Line

LWL Length on Water Line

Mayday English translation of the French m'aidez, "help me".

MBD Machinery Breakdown

Md Mendelevium

MDO Marine Diesel Oil

MGO Marine Gas Oil

M-Notice Marine Notice

MSD Material Safety Data Sheets

MSD Marine Sanitation Device

MSN Merchant Shipping Notice

MT Empty

MT Metric Ton

nm Nautical Mile

NM Nautical Mile

NRT Net Restricted Tonnage

NT Net Tonnage

O/O/B On Board or Overboard

o/b On or Before

O/Board On Board or Overboard

OMBO One Man Bridge Operation

OPP Oil Pollution Prevention

OWS Oily Water Seperator

OWS Oily Water Seperator

PFD Personal Flotation Devices

PK Peak

PM Planned Maintenance

PMS Planned Maintenance System

POSH Port Out, Starboard Home

Pot. Potable Water

PPE Personal Protective Equipment

PS Port Side

Pt Port

Refridge Refridgeration

Ro/Ro Roll on/Roll Off

ROB Remaining Onboard

RT Registered Tonnage

SAR Search and Rescue

SAS Safety at Sea

SB Safe Berth

SBT Segregated Ballast Tank

SDW Summer Deadweight

SG Specific Gravity

SHP Shaft Horse Power

SMC Safety Management Certificate

SMS Safety Management System

Sndg Sounding

SOLAS Safety Of Life At Sea

SS Starboard Side

St. Start or Stop

Stbd Satrboard

STM Steam

SW Salt Water

TEU Twenty-foot Equivalent Unit

TF Tropical Fresh

TFLL Tropical Fresh Load Line

TLL Timber Load Line

UMS Unmanned Machinery Space

V/V Valve

Veg Room Vegetable Room

VPP Variable Pitch Propeller

WL Water Line

WLL Winter Load Line