RE: tying off to the rigs
Most of the time they don't mind, but don't ever tie off to any of the semi- submersible type rigs like the ocean america or deepwater horizon, they will be yelling at you in an instant. Don't tie off if there is a crew boat around them either. Sometimes the boat has to move to different sides of the rig and its just proper etiquette to stay out of their way.
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