Echo sounder and speed log
The echo sounder measures depth under the keel; the log measures the ship's speed through the water or over the ground.
In 9 languages
| Language | Term |
|---|---|
| English | Echo sounder and speed log |
| Russian | Эхолот и лаг |
| Romanian | Sondă ecometrică și loch |
| Polish | Echosonda i log |
| Latvian | Eholote un lags |
| Filipino | Echo sounder at speed log |
| Indonesian | Echo sounder dan log kecepatan |
| Chinese | 回声测深仪与计程仪 |
| Croatian | Dubinomjer i brzinomjer |
Find it in the manuals All terms
Related terms
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.Freeboard and load lineHeight of the deck edge above the waterline; the load line marks show the deepest the ship may be loaded in each zone and season.Trim and list (heel)Trim is the difference between the drafts aft and forward; list is a steady lean to one side caused by uneven loading.Stability and metacentric height (GM)The ship's ability to return upright; GM must stay above the minimum in the stability booklet at every stage of the voyage.Pilot ladderRope ladder for the pilot to board; it must be rigged and secured exactly as required by SOLAS and checked by a responsible officer.