Perhaps. But proud of it!
Merchant seamen and others have a long-established history regarding tattoos. Whereas the current obsession is a fashion extreme, much as long hair was in the 1970s.
Anyway, for those too thick to do their own research, here's what the AP states - it also includes regulations that other vile practice, 'body piercing':
Body Piercing.
0157. All Personnel. Where any part of the body, other than the ear lobe for women, has been pierced or prepared, whether for any ring, stud or sleeper, no such items are to be worn when on duty or standby duty. Similarly, when not in uniform but on duty, standby duty or representing the RAF, the wearing of body piercing jewellery, trinkets or rings etc is not permitted, nor at any time when it may be seen to hold the Service in disrepute or adversely reflect upon the RAF. This ruling includes tongue studs.
Tattooing – General Guidance (AP3392 Vol 5)
0158. The Royal Air Force require personnel to present a high standard of appearance when on and off duty irrespective of the fashions prevailing amongst the civilian population. Tattoos and henna style markings should not to be visible when on parade in No 1 SD, if they are not covered by the uniform they are to be concealed cosmetically or by adhesive plaster.
0159. Tattooing is to be discouraged, and unacceptable tattoos or henna markings, whether ordinarily visible or not are not permitted. Such tattoos are defined as being any tattoo(s), excessive in size or number, obscene or offensive (e.g. racist, profane, blasphemous, anti-Semitic, overtly sexist, homophobic, drugs-related or of an extreme political nature).
0160. Detailed rulings and administrative instructions on tattooing are contained in AP 3392 Vol 5 which is the definitive document for the RAF policy on tattooing.