● = safe to land (ROLL, PITCH, INCLINATION, HEAVE RATE and MSI/WSI all within limits).
NB: The light is blue rather than green in order to distinguish it from the green helideck perimeter lights.
● = do not land (ROLL, PITCH, INCLINATION or HEAVE RATE out of limits).
● = Land with caution (MSI/WSI ONLY out of limits). Consider employing revised helideck handling procedures (see separate guidance).
( (●) ) = slow blue flashing - HMS in ‘on deck’ mode, relative wind direction is within limits.
(((●))) = fast AMBER flashing - relative wind limit approaching. Investigate cause and plan mitigating actions.
(((●))) = fast RED flashing - relative wind limit exceeded. Carry out planned mitigating actions.