CPA and TCPA
Closest point of approach to another ship and the time until it; the master's standing orders set the minimum CPA.
In 9 languages
| Language | Term |
|---|---|
| English | CPA and TCPA |
| Russian | Дистанция и время кратчайшего сближения (CPA, TCPA) |
| Romanian | CPA și TCPA (apropierea maximă) |
| Polish | CPA i TCPA (największe zbliżenie) |
| Latvian | CPA un TCPA (tuvākā satuvināšanās) |
| Filipino | CPA at TCPA |
| Indonesian | CPA dan TCPA |
| Chinese | 最近会遇距离与时间（CPA/TCPA） |
| Croatian | CPA i TCPA (najbliže približavanje) |
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Related terms
AIS (automatic identification system)Transmits the ship's name, position, course and speed by VHF and shows the same data from other ships.GMDSSGlobal Maritime Distress and Safety System: VHF, MF/HF, satellite, EPIRB and SART for distress alerting and safety information.Gyro compass and magnetic compassThe gyro shows true north and feeds radar, ECDIS and autopilot; its error is checked every watch, the magnetic compass is the backup.Echo sounder and speed logThe echo sounder measures depth under the keel; the log measures the ship's speed through the water or over the ground.Voyage data recorder (VDR)The ship's “black box”: records position, radar, bridge audio and VHF; after an incident the data must be saved.Passage planBerth-to-berth plan of the voyage with the route, waypoints, safe depths, no-go areas, reporting points and contingency plans.Waypoint and wheel-over pointA waypoint is a point on the planned route where the course changes; the wheel-over point is where the turn must start to reach the new track.Draft (draught) and draft marksDepth of the keel below the waterline, read from the marks at the bow, midships and stern; the mean draft is used for cargo and stability.