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- Master & Chief Mate (Oceans or Near Coastal (Offshore Supply Vessel)) »
- Q203 - Navigation General: Near Coastal
246. You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.
Calculate under-keel clearance by subtracting the vessel's draft from the actual water depth, which is the charted depth adjusted for the negative tide height, resulting in 39 feet.
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