Hi Jet84,
if you are launching from a boat and I'm assuming you won't be moving but want to allow for some movement/ drifting then you could set the RTH as the controller's location rather than the take off point. That way you could allow for a change in location. Personally if you used the RTH I would pause it on final part of return and bring back to you manually. Also consider bringing the Spark back slightly earlier than maybe you normally would...Just to allow more time to safely get back to you. (Extra 5% maybe). Just a thought [emoji106]