I'm  looking for a way to pause my rover (and boat) at a waypoint for a predetermined amount of time. Basically it would just need to set throttle to 0 for xx seconds and then continue mission when this is done. I tried condition_delay but had no success. Is this possible with the currently supported set of commands?

Both boat (mokia jet kayak based) and traxxas e-revo rover are working well and following a course between waypoints, but the above functionality  would very useful for some of the things I would like to do with the boat. For instance, stop to take a water measurement at each waypoint.