→ CRAB is a motion compensated gangway to enable direct transfer from the support vessel to the tur-bine Work Platform in high sea states.
→ The motion control is a passive counter balance system with a servo assist capstan. This reduces mass, cost and power consumption.
→ Inherently safe if system fails.
→ Control system passive when in manned use.
→ The bridge is secured to the target structure with an electromagnet.