Well, thanks.
But be aware it's just a remake of the 2D version as mentioned in http://www.gearthblog.com/blog/archives/2005/10/cruise_ship_pos.html

I like very much the 'Menu' -> activating nwl Follow ShipName will set or change the Cruise to follow; nwl Follow none will deactivate it.

These nwl's do not much more than change the name and href of nwl Updating Cruises/Following ...

Any other option could be set use these technics. I'll do solater.