Landing nets come in a variety of lengths ... so some models come with adjustable handles. Also, consider that the handle should be rigid enough to move through the water and strong enough ...

An Amazon patent diagram illustrates how adjustable landing legs act help keep the body of the drone (and the package it's carrying) horizontal when landing on sloping or uneven surfaces.

(Amazon Illustration via USPTO) Amazon’s inventors are taking a page from Inspector Gadget’s playbook to design drones with adjustable landing legs and reconfigurable propellers. Those two ...