A cannon pointing forward or aft, often of longer range than other guns. Those on the bow (bow chaser) were used to fire upon a ship ahead, while those on the rear (stern chaser) were used to ward off pursuing vessels. Unlike guns pointing to the side, chasers could be brought to bear in a chase without slowing.

Related Terms

BUMPKIN

The spar projecting from stern of ship

ALUM

Is an aluminum sulfate or filter alum. Acts in the range of 5.0 to 8.0 pH.

ISO SOLID CONTAMINANT CODE (ISO 4406)

A code assigned on the basis of the number of particles per unit volume greater than 5 and 15 micrometers in size. Range numbers identify each increment in the particle population throughout the spectrum of levels.

TRAMP FREIGHTER

A cargo ship engaged in the tramp trade.

CORDAGE

Ropes in the rigging of a ship

WEATHER SIDE

The side of a ship exposed to the wind.

FORWARD

The front part of a ship.

DOGWATCH

A short, evening period of watch duty on a ship

FARDAGE

A wood placed in bottom of ship to keep cargo dry

HYDROLANT

A radio message disseminated by the National Imagery and Mapping Agency and restricted to important marine incidents or navigational changes which affect navigational safety. The HYDROLANT broadcast covers those water areas outside and eastward of NAVAREA IV in the Atlantic Ocean. HYDROLANTS constitute part of the U.S. long range radio navigational warning system. The text of HYDROLANTS issued during a week which are in effect are available through NAVINFONET and are printed in the weekly Notice to Mariners.

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