[deidei]

> The Royal Navy seems to advertise all levels of jobs on LinkedIn - and wider.

Wasn't aware of this. Can you please link to some more similar job ads? Is this the standard in other militaries too?

Based on what I know there is a roster of eligible candidates with the required experience in most countries. One of them is promoted from there to fill in the vacancy. I've never seen an ad for a post like this before.