UKCLRN
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FEATURE OBJECT ATTRIBUTES
Attribute: Underkeel clearance
Acronym: UKCLRN Code:
Camel case: underKeelClearance
Attribute type: Complex
Definition:
The distance between the lowest point of the ship's hull, normally some point on the keel, and the sea bottom. It can be expressed with fixed or variable values.
Reference:
Based on IHO Dictionary, S-32, Edition 5 1994, and extended.
| Sub-attribute | Camel Code Identifier | Multiplicity | Sequential |
|---|---|---|---|
| UKCFIX | underKeelClearanceFixed | 0..1 | n/a |
| UKCVAR | underKeelClearanceVariable | 0..1 | n/a |
| OPERAT | operation | 0..1 | n/a |
Remarks:
UKC is either a fixed allowance in feet or metres or a variable allowance calculated from a percentage of the vessel's draught. A further allowance has to be made for ship's roll and pitch.
Comment:
The diagram below indicates the various allowances that need to be considered to establish underkeel clearance.
| David | Raphael | others | Jens |
|---|---|---|---|
| Y | Y | others Y/N | Y |