Det Norske Veritas - Germanischer Lloyd

Certification of offshore gangways for personnel transfer
 N ST-0358

Annotation

General

This standard for certification describes the procedures and requirements for obtaining certificates for offshore gangways.

The following topics are covered:

— design approval

— materials

— welding

— production

— testing.

Requirements for operational procedures and training as required for type 3 gangways (see [1.4.3]), are not part of the scope.

Passive and active systems

The scope of this standard covers both passively and actively motion compensated gangways.

— The design of passive motion compensated gangways incorporates features that allow the gangway to accommodate the relative motions between vessels without making use of any external systems or equipment.

— Active motion compensation implies a system powered by an external power supply that reduces or cancels (compensates) the effect of the vessel motions (from one degree of freedom to all 6 degrees of freedom) on the gangway structure.

Types of gangways

The standard covers the following types as related to the operation of the gangway: