Glass Reinforced Plastic

Gears

Gross Registered Tonnage

Geological Survey/Supply Vessel.

Guaranteed Safe Berth

Geological Survey Ship.

Gross Standard Volume

Gross Tons

Hull and Machinery

H2A Radio transmission designatorMbr>Telegraphy by the on-off keying of a tone modulated carrier, Morse code: single-sideband, full carrier. (ALRS)

H2B Radio transmission designatorSelective calling signal using a single frequency code, single-sideband, full carrier. (ALRS)

H3E Radio transmission designatorTelephony using amplitude modulation: single-sideband, full carrier. (ALRS)

H9W Radio transmission designatorComposite emission: single-sideband, full carrier; composite system with one or more channels containing quantized or digital information together with one or more channels containing analogue information (eg: combinatio ...

Hatch.

Hatch

Hazardous Material

NOAA's Hazardous Materials Response and Assessment Division

Hazardous Materials

Hopper Barge

Hydrostatically Balanced Loading