They were provided with a free uniform, besides being repaid their fares to their training centres and an allowance for each exercise or instructional period. In the Port of London alone there are six such training centres, and for administrative purposes the United Kingdom is divided up into four main areas under the Naval Commanders-in-Chief at Portsmouth, Plymouth and the Nore, and the Flag Officer Scotland, each of whom has a Command Mine watching Service Officer. There are Port M.W.S.O.s in the various ports or areas with Section Officers, Chief Mine watchers, Leading Mine watchers and Mine watchers working under them.
