Fine dust or salt particles dispersed through a portion of the atmosphere; a type of lithometer. The particles are so small they cannot be felt or seen with the naked eye. Many haze formations are caused by the presence of an abundance of condensation nuc ...

To make life onboard for the crew as uncomfortable as possible, by keeping them at work at all hours, often unnecessarily.

Name sometimes given to a transmissometer.

Name sometimes given to a transmissometer.

Hazardous Materials

NOAA's Hazardous Materials Response and Assessment Division

Hazardous Material

Hopper Barge

Hydrostatic Balanced Loading. Method of loading large oil tankers which allows to extends the lives of tankers from 25 to 30 years with regard to MARPOL phase-out provision.

Hydrostatically Balanced Loading

Hydraulic Coupling

High Capacity Passenger Vessel

Hydrographic Chart Raster Format

Hopper Dredger

Half Dispatch Lay Time Saved Both Ends

Half Dispatch Working Time Saved

Human Element

A unit of pressure for a fluid, commonly used in water pumping and hydropower to express height a pump must lift water, or the distance water falls. Total head accounts for friction head losses, etc.

The ship's water closet (toilet or wash-room). The upper edge of a quadrilateral sail.

The energy in foot pounds required to compress adiabatically and to deliver one pound of a given gas from one pressure level to another.