You should always you Boatigo's inbuilt messaging system to contact Skippers.  To message a Skipper to enquire:

1.  Click on their listing to be taken to their listing page.  You will be able to see all details relating to their listing.

2.  You can click on the "Contact" link underneath their listing name at the top of their listing page

3.  You can also scroll down to the bottom of the listing until you see the "Your host" section

3.  Click on "Contact" to start a messaging dialogue with the host