As much as I would like to attribute our baby's ability to sleep through the night to something that Eric and I are doing, I'm pretty sure we just got (extremely) lucky. Both Eric and I are expert sleepers, so it is no surprise that Helina has a talent for it, too.
Despite a possible genetic predisposition for drowsiness, I can't help but wonder if Sea Gem has something to do with Helina's knack for sleeping. Many of our guests comment on how relaxed they feel aboard our boat, and even my mom, who is one of the most active people I know, seems practically sedate while aboard. Other evidence that points to Sea Gem is what happens when Eric and I stay on land for the night--we don't sleep, or rather, we can't (not very well anyway).
This phenomena seems to extend beyond sleep though. I've noticed that, during the day, Helina is extremely calm. Although this may just be part of her personality and natural disposition, I think the gentle motion of the water and coziness of the sailboat promotes tranquility, which helps produce a calm little baby.
So is it the boat or the baby? I guess the only way to know for sure is to bring a bunch of colicy babies aboard and see what happens. Sadly, I'm unwilling to conduct such an experiment aboard our sailboat, but I'd certainly be interested to read the results of such a study if someone else wants to take that one on.