How to Calculate Under Keel Clearance ll Determine Ship's UKC ll CATZOC ll Squat ll Passage Planning

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This video provides a step-by-step guide on calculating a ship's Underkeel Clearance (UKC) in accordance with the company's procedures. It's important to note that procedures may vary among different companies, and this tutorial is intended solely as a reference. The process involves assessing depth accuracy through the use of a Category of Zone of Confidence (CATZOC).

The Ship's UKC stands for "Ship's Under Keel Clearance." It refers to the vertical distance between the lowest part of a ship's hull, usually the keel, and the seabed beneath it. UKC is a critical parameter in maritime navigation as it determines the minimum depth of water required for a ship to safely navigate without grounding.

The Electronic Navigational Chart (ENC) within the Traffic Separation Scheme (TSS) is deliberately scaled down, making the depth-sounding appear shallower in the Northbound lane. However, adjusting it to a larger scale reveals ample navigable water within the traffic lane.
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