Those things would definitely be useful, but potentially more useful when they actually get to land and are ready to scout out Tavimbi. For most of the time for this move, until they get closer to land, scouting will be done with water in the way. Valdis might be able to stand in the boat and sniff and look for anyone on other boats sailing in the area, but I'm not sure how much she'd be able to really do until the turtle is grounded. (I'm thinking he'll still be grounded offshore, considering his size.)

Unless you could see her scouting that way, it might be best to start thinking about a landing party for when they get there? (I have no idea what they'll run into or who will be inhabiting the land, in full disclosure.)