Class notation for Dynamic Positioning with a redundant dynamic positioning system and an independent joystick system back-up.

Purpose

The dynamic position system is regarded as the complete installation necessary for dynamically positioning a vessel, including the power system, thrusters, DP-control system and independent joystick system. The class notation correlates to IMO equipment class 2 for vessels with a Dynamic Positioning System.

Benefits

The notation ensures that the vessel has an arrangement that is sufficient to meet class requirements and IMO guidelines for Dynamic Positioning Systems. This notation enables the customer to offer services in operations requiring Dynamic Positioning equipment class 2.

Features

The following additional documentation is applicable:

• Instrumentation and automation; dynamic positioning control and monitoring system, independent joystick system, thrusters, mode control selection, position reference systems and sensors, power management system

• DP-control centre arrangement and layout documentation

• Failure mode and effect analysis and test program

• Programs for test and trials

• Electric power system documentation; such as electrical load calculation during dynamic positioning operation

• Calculation of the environmental regularity numbers evaluation, ie, the ability to keep in position relative to weather conditions

The scope related to the DP notation covers certification of the DP systems, verification/review of the related machinery systems and comprehensive testing of the DP functionality. The notation includes FMEA (Failure Mode and Effect Analysis) requirements, and the scope includes a thorough review of the FMEA and subsequent testing.