B.R. 2806
Article 3334: the manual that told the Navy what to wear underwater
12 July 2026 · 4 min read
Navies write everything down. How to rig a lifting bag, how to zero a depth gauge, how to read a compass through murk — and, in the Royal Navy's diving manual B.R. 2806, precisely which wristwatches were provided for diving operations.
That instruction is Article 3334 — “Diver's Watches”. It opens with a sentence of perfect service economy:
“Two types of wrist watch are provided for use when diving — the diver's watch, ‘Rolex’ or ‘Omega’, and the supervisor's watch, ‘Lemania’.”

Two watches, two jobs
The diver's watch — the Rolex or Omega — went underwater. The manual notes it could be used “to any depth attainable by current Service equipment”, fitted with a revolving bezel to indicate time elapsed, often strapped to a swimboard beside the depth gauge and compass.
The supervisor's watch had a different job. The supervisor stood at the surface, running the dive: timing every man in the water, logging bottom times, holding the schedule that kept divers inside their decompression limits. The manual's description of his Lemania is almost dismissive — and completely precise:
“The supervisor's watch is used only for supervision. It is splash-proof and not pressure resistant.”
No bezel, no depth rating, no glamour. Just a plain, legible, absolutely dependable timekeeper — for the one person whose timing mattered to everybody else's life.
The watch we built from a paragraph
Our 3334/SW Supervisor's Watch takes its name from that article — 3334, Supervisor's Watch — the way our diver takes its name from the order that created the branch. Time-only, black sandblast dial, aged numerals, Swiss-made automatic movement.
One respectful upgrade: where the original Lemania was splash-proof and nothing more, ours is rated to 100 metres. Standards move on. The job description doesn't.
The 3334/SW Supervisor's Watch is named after this article — the supervisor's timekeeper, continued, and this time rated to 100 metres.
Meet the 3334/SW