What is Ukc in shipping?

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.

How is Ukc calculated on a ship?

UKC is equal to the minimum total water depth at the location of the ship minus the maximum dynamic draft of the ship. The dynamic draft is the distance from the water’s surface to the lowest point on the ship’s keel while the ship is in motion.

What is the minimum UKC?

Recommended safe Under Keel Clearance (UKC) are as follows: Open Sea (FAOP): The minimum UKC in the dynamic condition is 50% of the static draft. Restricted Waters/Port Approaches/Harbour Transits (SBE): The minimum UKC in the dynamic condition is 10% of the static draft.

What is the importance of the ship’s Ukc in preparation of a voyage plan?

The UKC is calculated for each leg of the voyage, as well as for both arrival and departure at each port. Both Masters and ports must be satisfied that there is sufficient UKC according to their ship- and port-specific calculations.

What is the importance of Ukc?

Under-Keel Clearance (UKC) is a very important and contributing factor among many factors that influence navigation safety, especially in shallow waters and restricted waters.

What does Ukc stand for?

United Kennel Club
Breed Standards | United Kennel Club (UKC)

What factors decide and affect Ukc?

FACTORS AFFECTING UKC CALCULATION The predicted height of the tide and the tidal window for safe passage. Changes in the predicted tidal height, which are caused by wind speed and direction and high or low barometric pressure. Nature and stability of the bottom – i.e. sand waves, siltation etc.

What is net Ukc?

Net UKC is the sum of wave response and manoeuvrability margin. In the absence of any wave influence, it may be taken as being the remaining minimum UKC when the vessel is moving, and this minimum will need to be determined beforehand according to bottom and vessel type.

What is the life expectancy of a ship?

25-30 years
The average lifespan of a ship is 25-30 years. After this span, the ship may become too expensive to operate, but most importantly, to become unseaworthy putting human safety at risk.

What is the effects of under keel clearance on a ship?

In open waters, a larger minimum under keel clearance allowance will be used to account for the vessel’s dynamic movement in a seaway and other external factors leading to subsequent changes in draught. Generally transits will be planned for any state of tide. Available depth of water is affected by height of tide.

What is the importance of under keel clearance in passage planning?

under keel clearance to provide safe navigation through the areas with restricted available depth of water and thus enhancing safety of shipping and protection of environment.

What are Faсtors taken into Aссount when determining Ukc?

The following faсtors should be taken into aссount when determining UKC: Hull sinkage and сhange of trim.