Why spend more money on robotics when you have an almost unlimited supply of patsies. A 2 weeks trip originating in narrow Jungle swamps and transiting deep ocean water would require serious robotic control. But if they keep making so much money I wouldn't be surprised if they went all Mars rover on the subs. Hell when I first saw these things a few years back they were just fiberglass boats with no top, that Feb 1st craft was a legitimate submarine.