It can be simultaneous (realized in the same period of time) or it can be done in two different time periods. The ship owners agree as they prefer.
BOAT HOLIDAY EXCHANGE
It offers the option to be hosted on boat and to host your respective host on each other boats.
Some members prefer this exchange opportunity because they plan to sail with other people, make friends, make relationships, or simply because it allows their children to play with the host’s children.
It allows to sail in difficult environments/waters (i.e. Iceland) together with someone that really know that area.
Moreover, this option allows you to sail with a person (your sailing partner) that really knows the sailing areas and sites where he lives: this allows you to visit the most beautiful and hidden spots, to discover the best restaurants