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| Word |
Description |
| fathom |
Six feet. |
| fender |
A cushion, placed between boats, or between a boat and a pier, to prevent damage. |
| fiber optic gyro |
A high accuracy rate sensor that uses a laser and fiber optic ring to determine angular rate. |
| field |
In the NMEA 0183 standard, a character or string of characters immediately preceded by a field delimiter (see Delimiters). In NMEA 2000® , fields of data that make up a PGN. |
| figure eight knot |
A knot in the form of a figure eight, placed in the end of a line to prevent the line from passing through a grommet or a block. |
| fixed field |
In the NMEA 0183 standard, a field in which the number of characters is fixed. For data fields, such fields are shown in the sentence definitions with no decimal point. Other fields that fall into this category are the address field and the checksum field. |
| flare |
The outward curve of a vessel's sides near the bow. A distress signal. |
| flood |
An incoming current. |
| floorboards |
The surface of the cockpit on which the crew stand. |
| fluke |
The palm of an anchor. |
| following sea |
An overtaking sea that comes from astern. |
| fore-and-aft |
In a line parallel to the keel. |
| forepeak |
A compartment in the bow of a small boat. |
| forward |
Toward the bow of the boat. |
| fouled |
Any piece of equipment that is jammed or entangled, or dirtied. |
| freeboard |
The minimum vertical distance from the surface of the water to the gunwale. |
| frequency range |
See "bandwidth". |
