2. They install computers in the electronics cave below the wheelhouses because nobody knows what most of the electronics there do in the first place.
Today there are hundreds of mega yachts in Fort Lauderdale, Florida with thousands of unscreened workers maintaining the yachts before they leave in November for a season of cruising and charters in the Caribbean.
3. They get caught by Russian mafia while in Martinique or St. Lucia.
4. They MacGyver their way out of the Caribbean while being chased by thugs with unlimited resources.
I'll get around to writing it one of these days.