How the High Seas Fleet was prepared for scuttling

How had German crews prepared the interned High Seas Fleet for scuttling?

They disabled or removed closures and kept internal routes open so water could spread quickly through the ships.

German crews had spent months making their ships easier to sink. Bulkhead doors were held open, valves and other closures were removed or disabled, and the internal subdivision that normally resisted flooding was compromised. Once openings admitted water, the ships could settle before British boarding parties restored control. The preparations turned the scuttling from an improvised decision into a deliberate operation.