You are approaching another vessel and see that it has the signal flag “O” hoisted.What is your next action().
A、Proceed on present course and speed since the vessel is requesting a pilot
B、Attempt to call the vessel on VHF radiotelephone and begin a search because the vessel has a man overboard
C、Attempt to call the vessel on VHF radiotelephone because it is disabled
D、Approach with caution because the vessel is stopped and making no way through the water