Agree with govikes. Must know the reef only a few cuts to cross through many miles to get stuck on, and no coastgaurd as in the USA. Marty provides some great maps for youto geat an idea
I have seen a new cat crash onto the reef, no machines to rescue it, the wife stayed on board to prevent theft while the husband when on shore to take care of business. But the boat got stripped by thieves and salvaged finally. The couple went home.
Get a local captain to guide you in & show you tricky areas - like tres cocos! The current & weather have much to do with how to approach & where. There was even a wreck at the cut!