It is possible to fix latitude through sight of the sun, moon and stars and direction using a crude compass (from a magnetic stone or lodestone) but perhaps,
The great tree on an Elf Galegas senses the direction of sacred groves or great tree at its destination.
A Dwarf Floating Castle might have mechanical devices that could precisely measure distance and time travelled (enabling the ships position of longitude to be calculated). Perhaps they have plans for Global Positioning Satellites?
Captains from the West may use a combination of a Rutter (A personal record of facts, courses and charts) and technology such as an astrolabe, cross staff or quadrant.
The Vadeli have some fiendish sorcerous device and/or tortured the information from their victims.
Nick
End of The Glorantha Digest V6 #341
Powered by hypermail