Glossary: A
11 terms.
- Able SeamanCertified deck rating with a minimum of 18 months sea service, competent in watchkeeping, mooring, and cargo handling.
- AIS Class AThe mandatory AIS transponder fitted on SOLAS ships transmitting vessel data at regular intervals and responding to interrogations.
- AIS Class BA lower-power AIS transponder used by smaller non-SOLAS vessels, transmitting position and identity data at reduced reporting rates.
- Anchor Handling Tug Supply VesselAn offshore support vessel designed to tow and position mobile drilling rigs and handle anchors in deepwater operations.
- AnchorageA designated area with suitable holding ground where a vessel anchors to wait for a berth, tide, or clearance.
- Angle of LollThe angle at which a vessel with negative initial stability comes to rest on her side as she cannot return to upright.
- Annual SurveyA classification inspection conducted each year to confirm that a vessel's hull and equipment remain in a satisfactory condition.
- Automatic Identification SystemVHF transponder system that automatically broadcasts vessel identity, position, course, and speed to nearby ships and shore stations.
- Auxiliary EngineA diesel generator engine providing electrical power for shipboard systems independent of the main engine.
- AzimuthThe angular bearing of a celestial body measured clockwise from true north, used to check compass error.
- Azimuth ThrusterA propulsion unit that can rotate 360 degrees, providing both thrust and steering without a conventional rudder.