Aside from being an overhead dive where there’s no immediate access to the surface, there’s little or nothing in common between wreck diving and cave diving.
The first thing about wrecks is they’re ever changing and full of entanglement opportunities and pieces easily break off. Wrecks are seldom deep penetration dives and much of the hard and fast caving rules certainly don’t apply.
Caves don’t generally change shape unless the water level rises with rain. Their basic topology may not have changed in thousands of years. Wrecks change with each passing storm and decay. In many ways wrecks are more akin to diving in mines than caves as in the environment can rapidly change — a rotting pit prop gives way.
The generic rules of caving — continuous line, rule of thirds or less — generally don’t apply to wrecks as penetration tends to be short. Wrecks demand common sense and good core skills as they normally have a lot of silt, obviously this applies to many caves too.
The challenge with wrecks is finding the fine line of exploring the marine architecture without putting yourself in danger. Most wartime wrecks are now collapsing and offer limited long penetration opportunities. Looking at the props, boilers, engines, bow, etc.