Hydrographic Office (UK)

Honduras (Flag)

Hold

Heavy Oil

Horizontal

High pressure

Horsepower

High-Pressure

hectoPascal. Unit of pressure used in weather reports and forecasts. Is equivalent to and replace the millibar.

High Pressure Turbine

Hellenic Register (Greek Class Society)

Human Reliability Analysis Used in safety studies.

Human Resources Department.

Hydrostatic Release Unit

Harbour Service.

Harmonized Commodity Description and Coding System

High Speed Escort Ship.

High Speed Passenger.

High Speed Craft. Mostly ferries, catamaran

High Speed Craft Code (IMO)