What is the minimum under keel clearance?

What is the minimum under keel clearance?

Many ports use whichever is the greater of a defined figure or 10% of a vessel’s draught as the minimum under keel clearance.

What does under keel clearance mean?

Under-Keel Clearance, or UKC, is the vertical distance between the lowest part of the ship’s hull and the seabed. Maintaining a minimum UKC is essential for the safety of navigation. Static UKC is the minimum clearance available between the deepest point on a vessel at rest in still water and the bottom.

What is the significance of under keel clearance in ship handling?

To ensure safe navigation while approaching shallow water, it is the Master’s responsibility, who must calculate precisely under keel clearance requirement for the vessel and ensure that remains afloat at all times.

What is the minimum under keel clearance allowed to pass over a pipeline?

How is Ukc calculated on a ship?

The Nett UKC is calculated as the available water depth for each part of the transit, minus the overall dynamic draft. In order to calculate the nett underkeel clearance of a ship in shallow water with waves present, the heave, pitch and roll of the ship are first calculated in given wave conditions.

What is Ukc in the ship?

All navigators will be aware of the importance of Under Keel Clearance (UKC) and the basic calculations involved in its simplest form, static UKC is the space between the bottom of the ship and the seabed.

What is the formula for calculating Ukc?

Predicting UKC for a ship in shallow water [Net UKC] = [Chart datum depth] + [Tide] -[Static draft] -[Squat, heel and wave response] (1)

What is Ukc on ship?

In simple terms, under keel clearance is the vertical distance between the bottom of the ship and the seabed. As the seabed is a complex surface that is likely to differ in depth at all points across the ship hull, that clearance should be sufficient to allow ship’s floatability in most unfavorable weather conditions.

What is the minimum allowable Ukc to maintain when passing the entire passage?

3.50 meter
Minimum allowable UKC to maintain when passing entire passage is 3.50 meter (One Fathom Bank and Buffalo Rock), EXCEPT when passing EASTERN BANK, in the season of North-East Monsoon at the South China Sea, where Minimum allowable UKC to maintain is 4.00 meter.

What are the 4 stages of passage planning?

There are four stages for passage planning:

• Appraising all relevant information.
• Planning the intended voyage.
• Executing the plan taking account of prevailing conditions.
• Monitoring the vessel’s progress against the plan continuously.

What is contingency Anchorage?

What is Contingency Anchorage? An Anchorage area marked after the abort point and point of no return where, the ship can anchor in the case of an emergency if the events do not go as planned and the vessel had to take emergency action.

What is the sailing term for left hand side?

When looking forward, toward the bow of a ship, port and starboard refer to the left and right sides, respectively. In the early days of boating, before ships had rudders on their centerlines, boats were controlled using a steering oar.

What is abort point in ECDIS?

Abort point is the point on the passage beyond which there is no sufficient sea room to turn back the vessel. When approaching or entering a port or procedding in a channel, the width of the channel may not be sufficent to turn the vessel.

Why are sailing ropes called sheets?

Old English apparently. “rope that controls a sail,” O.E. sceatline “sheet-line,” from sceata “lower part of sail,” originally “piece of cloth,” from same root as sheet (1) (q.v.).

What is a lazy sheet in sailing?

A lazy sheet is a line that is rigged to be used as a sheet, but is currently not doing anything. For example, two lines might be tied to the clew of a jib sail to be used as sheets. When the boat is on starboard tack, the port side jib sheet will be under tension, and the starboard side line should be slack.