Most shipwrecks are located away from land and, as a result, are subject to larger waves than in sheltered waters. Simply getting back on board in high seas can be a challenge. Most wrecks are also located where some ocean current is flowing. A wreck that has a strong current flowing over it can be very dangerous to dive, especially for novices. Poor visibility is a danger on some wrecks.
Low visibility makes diving dangerous because it s easy for diving buddies to become separated.
A buddy-line is recommended in poor visibility. Surge can slam divers into the wreck or into other things that can harm them. Wrecks with waves rolling over them should be approached with caution. If a wreck has been down for a while, it has probably attracted an array of marine life. Underwater growth on wrecks in warm water usually includes fire coral and sea urchins.