When to use the "Water" map symbol...

[GoblynByte]

I'm having some trouble figuring out exactly when to use the symbol for a world with water (and one without) on a subsector map.

Best I can figure out is a word with a hydrographic score greater than 0, and an atmosphere score less than A (assuming frozen water still counts as water being present).

Is there an official (correct) criteria that I'm missing?

Thanks in advance!

 

[aramis]

I'm having some trouble figuring out exactly when to use the symbol for a world with water (and one without) on a subsector map.

Best I can figure out is a word with a hydrographic score greater than 0, and an atmosphere score less than A (assuming frozen water still counts as water being present).

Is there an official (correct) criteria that I'm missing?

Thanks in advance!

If Hydrographics is ≤2 (Dry or Desert worlds)
—OR—
If Atmosphere is A+ (Fluid Oceans) - because the fluid in question isn't water.

 

[inexorabletash]

https://travellermap.blogspot.com/2006/01/no-water-present.html?m=0

Water is "present" if:

Hydrographics > 0
and
Atmosphere > 1 (else, ice capped)
and
Atmosphere < A (else, exotic, so a fluid hydrosphere if Hydro > 0)