Escape to Ireland

Your Dad promised you when you entered high school that if Chloe, your little sister, and you maintained a 4.0 average all the way through high school he would sail with you to Dublin to visit your Irish relatives. Your Mom would, of course, come along but Dad, Chloe and you would handle the Subtle Influence, your 40 foot Freedom cat-rigged ketch. You did it! You graduated with that 4.0 average and you were scheduled to cast off the next morning. But that night your parents were killed in a head-on collision. You are only 17 and your sister is 15. Child Care is looking to grab the two of you. So do you cast-off anyway, just your sister and you, and hope to sail safely across the North Atlantic and get help from your Irish relatives?