UKCLRN
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 ((or the advertised water depth)). 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 | True |
| UKCVDB | underKeelClearanceVariableDraughtBased | 0..1 | True |
| UKCVBB | underKeelClearanceVariableBeamBased | 0..1 | True |
| OPERAT | operation | 0..1 | True |
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 |