Bon Voyage. It is possible to eat healthy even on a cruise. However most people, me included, gain a lot of water weight. Don't know why, may be high sodium. I heard it from shop assistant in a ship boutique that most women have trouble with ring sizes because their fingers swell while on board. So don't get too scared when you weight in after return. I was back to normal in about a week.
The first thing you lose on a diet is your sense of humor. ~ Author Unknown
It doesn’t matter what diet you follow… What matters is what makes you follow your diet. ~ Tom Venuto