The RN [Royal Navy], and every other seagoing Navy out there operates its ships on a rotational basis. This simple concept can best be described as ‘the rule of three’. Namely, for every ship that is on the front line at sea right now on live operations (e.g. fully stored, fuelled and munitioned and operating under a specific operation), you require a further two ships in the pipeline. The first is the one that’s just come home and gone into refit or lower level readiness. This is because the crew need to take leave, parts need replacing and the ship needs maintenance. The second is the ship that will replace the ship deployed, and this vessel will usually be in some point of the force generation cycle, which involves final bits of maintenance, trials, basic sea training and more advanced sea training and any other targeted work to get her ready to sail. This is a complex process that takes many months to fully prepare a ship to sail.
Over a couple of years life, a ship is programmed by the RN planners (a special breed of people possessed of wisdom, foresight and very little hair left at the end of their tour) to come out of a refit, work up, complete all trials and training, deploy for 9 months, return home and then wind down before going in for the next cycle of refit and repair. This cycle is either repeated, or broken up by the occasional deep multi-year refit to extend her life or fit major new equipment.
In simple terms this means that to keep 5-6 ships deployed, you need a force of roughly 17-18 escorts at any one time. Possessing 19 escort ships does not mean that 19 ships can go to sea on operations. It means you have got the ability to keep 5-6 ships deployed on station indefinitely.
This may sound a technicality, but is actually really important to understand. What distinguishes the RN from a lot of coastal navies is that sustaining this sort of deployment is routine business – the RN accepts that it goes to sea across the globe and plans this as a routine activity. For many navies, an ‘out of area’ deployment is a major investment of time and support and training, and is something that may occur once every 4-5 years, not every day of the year.
Sir Humphrey, “No – the Royal Navy is not a global laughing stock”, Thin Pinstriped Line, 2017-09-15.
November 21, 2017
QotD: The naval “rule of three”
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