This is a critical question. The is a UK Crown Copyright document. Historically, the Ministry of Defence has restricted distribution to active-duty personnel and authorized contractors. However, over the years, certain versions have been declassified or released into the public domain, especially older editions (e.g., pre-1995).
UK Military Diving Manual BR 2806 | PDF | Buoyancy | Pressure. 2K views232 pages. UK Military Diving Manual BR 2806 | PDF | Buoyancy - Scribd
: Historical editions of the manual are occasionally available for purchase through specialty retailers like Enfield Athletics Key Regulations and Guidelines Surface Intervals