IMO i don't think the captain will get charged lah. We're all
humans, not robots. Nth wrong with kissing ur gf/future wife if the
situation allows it.
As for double standards...hmmm. I remember during my bmt, when
confinement was still 3 weeks, my then-gf came. We had a super-long
frenchie behind the yellow box, and kana spotted by my PC...didn't
know until after my parents left and he told me he saw, but he
understood. 
And anyone who was ever a naval trainee at the old INTO at
sembawang camp will know, the old naval museum there was a choice
spot for hanky-panky during Visiting Day. 