This construction permits selective operation in a shallow draft mode, in a normal draft mode or in between.

In case somewhere a smaller maximum draught for passing vessels is allowed.

With a normal 8.5 meters draft, the icebreaker LK-60 will be able to enter the Dudinka port (in the Krasnoyarsk region), in the Gulf of Ob and other drought areas.

It is now a shallow patch approximately 4 metres deep at extreme low tide, which offers no danger to vessels of normal draft.

The lower part of the fins (5) is located above the base line (6) of the vessel, and the upper part of the fins (1) is at normal operational draught located below the waterline (4).

This programme calculates the weight loaded (or discharged) using the internationally standardised draft survey protocol.

This construction permits selective operation in a shallow draft mode, in a normal draft mode or in between.

depth below waterline at maximum draught(s)

Ability to calculate with water levels, depth and (air) draught using relevant information sources.

Draught of the vessel in centimetres

Draught of the convoy in centimetres

zero point of the draught scale

loaded on an uneven keel

where: dS is the subdivision draught; and dLS is the lightship draught.

A vessel (10) which can convert from a deep draft configuration to a shallow draft configuration is disclosed.