Boat Owner relationship needs to be transparent and swift. Creat the boat owner and the contract for the exploitation. Then, for every booking wou'll be able to generate a setlement for the boat owner, and give him an access to his boat on your calendar.

Let's start by setting up his commercial and accounting information:

In the contract tab you define the payment to the  Boat Owner for each booking.

In the B2C field is the amount corresponding to a direct booking.

In the B2B field the amount if the booking is made through an agency.

These can be percentages or fixed amounts per booking.

Users Tab:

Creat a user for the Boat Owner where he will see The planner only for his boats. He will be able to create marks and block abvailabilities if your cooperation agreement allows it.

The access will be on the same URL as yours: www.backoffice.andronautic.com