I hate to be advertising other sites on Neal's website, especially since he gets monies from people buying via the Amazon link, however, this is too important to slip our collective fingers.
With digital distribution of classic subsim titles limited as it is, today's release of Silent Service 1+2 on GOG presents a breath of fresh air. So for those of you wishing to replay the classics of yore without paying an arm and an leg, follow the link bellow.
http://www.gog.com/game/silent_service_12