BRd 2806(5) provides details of the level of training required to crossover military (RN, RE) divers to BSAC qualifications. With the changes to the Ocean Diver syllabus some of the theory lessons no longer have the same content which means that elements are missing.
JSSADC have put together a bespoke presentation which covers the elements previously included in OT1 and OT4. It also provides additional information on JSAT diving which is likely to be relevant for military crossovers.
The presentation can be accessed by clicking this link (now at version 1.1). If you have any comments then please feed them back to Chief Instructor JSSADC.