TSM Poster028

Quality Assurance into the 21st Century and beyond

CONTROLLED Revision: 01 Oct 2010Approved by DPA/DMR

THOMESHIP MANAGEMENT PTE LTD

Under Keel Clearance & Air Draft Policy

1. Thome Ship managemenT UKC poliCyThome Ship Management advocates a Minimum Under-Keel Clearance policy for ocean passage, shallow water, within port limits and while alongside the berth or at SBM/CBM mooring. Thomes guideline for under keel clearance is based on the recommendations of the Society of European Pilots for vessels calling at Rotterdam, Amsterdam and Antwerp which are:

Ocean Passage o 20% of Draft

Fairways outside ports (Shallow waters) o 15% of Draft

Fairways inside ports (Within Port Limits) o 10% of Draft

Whilst alongside the berth o 10% of Draft

Whilst at SBM/CBM moorings o 10% of Draft

For Fairways inside Port limits, if the Port / USCG / Pilot recommended UKC required is more than 10% of the draft, Vessels are required to comply with Port / USCG / Pilot recommended UKC.

Calculation of UKC using TSm 002

Thome instructs that Under Keel Clearance calculations are to be done using TSM Form 002 by all ships. These forms will be filed and retained along with the passage plans. As a minimum, Under Keel Clearance Calculations must be computed for

Each arrival and departure, for all ports.

Any Course leg, if the depth is less than 50 mtrs

When To inform office

Vessels are required to inform Office if

UKC computed is less than Thome under keel clearance criteria

Under Keel Clearance computed is less than 2 metres (During Ocean Passage)

Under Keel Clearance computed is less than 1 metres (During during Port approach, Pilotage / Port transit or at Anchorage / Alongside berth

2. minimUm air-draFT ClearanCeA minimum air draft of 2 metres is required for passing under bridges or overhead cable. After calculating for all variables such as trim and tide, Thome must be consulted if calculations indicated that clearances may be less than this.