Detecting things underwater?

[MasterGwydion]

Are there rules anywhere for detecting things 10km underwater from a ship that is flying above the water or in orbit?

 

[collins355]

Use a densitometer? (if your preferred Trav edition has such things - they were introduced by DGP in MegaTrav.)

 

[hopsnbaer]

I have not seen any. maybe look at the Gas Giant rules in the Companion for inspiration.

 

[MasterGwydion]

Use a densitometer? (if your preferred Trav edition has such things - they were introduced by DGP in MegaTrav.)

Do these have different ranges when used in space versus when used in an atmosphere? Or underwater? Or through several kilometers of rock? Or do I just assume that it functions out to whatever range it says and don't overthink it?

 

[hopsnbaer]

Unless it is going to be a core mechanic in your game, I would suggest not overthinking it and do what you think fits.

 

[shirgall]

Do these have different ranges when used in space versus when used in an atmosphere? Or underwater? Or through several kilometers of rock? Or do I just assume that it functions out to whatever range it says and don't overthink it?

On page 160 of the Core Rulebook (2022) it does have effectiveness and range bands for the densitometer, and it should work with liquids because it's using a planet's gravity differences to do its sensing. "Full" capability looks limited to 10km.