John's correct here, and an internet forum (even one as illustrious as PPRuNe) is no place to learn how to land on a moving deck.
Winching is indeed different than landing on, whether the purpose of the winching is personnel transfer or to bring up a fuel hose to allow one to defer a landing until conditions improve or the ship can find a lee. And winching an inanimate object is different than winching a living hunk of protoplasm.
It's part art and part science.
Working in offshore for one example, limits are defined, and a good bit more limiting than those in the services, and that is as it should be. One also has an alternate in offshore, not necessarily so on maritime operations, especially in somebody else's or international waters. It doesn't make one type of operation better than the other, but it does shape operating philosophies. Having done both, I can tell you there are many differences.
There is someone out there who does what you wish to do, with a similar scope of operations. Just because a uniformed aviator from some service brought a helicopter aboard at night and out of limits (and many have) doesn't necessarily give anyone carte blanche to repeat the performance, but for that pilot it likely was the best idea that was available at the time out of a limited selection of options.