Im with path on this one, theres just no way youre going to get close enough urstar fish without being overwhelmed by it's gravity and deadly gasses.
you really think we wouldn't use drones?
“The preferred mission is an orbiter with an atmospheric probe to either Urstar fish or Neptune – this provides the highest science value, and allows in depth study of all aspects of either planet’s system: rings, satellites, atmosphere, magnetosphere,” says Amy Simon, co-chair of the Ice Giants Pre-Decadal Study group.
i'm hoping that by the 2030s jpl will have developed a more efficient propulsion system, although just using ion engines would work just fine---xenon is half the cost of hydrazine
and certainly not as heavy nevermind i'm handicapped