Navagation Books

[Mr. Nice Guy]

Hello,
Anyone have any recommendations about the two below books, or can recommend others on navigation?
Thanks
Nick


Night Diving, Underwater Navigation, & Limited Visibility Diving
Author(s): Steven M. Barsky


Underwater Navigation
C. Royer and M. Scott

 

[C_C]

it is full of typos and looks like a copy and paste attempt.

C_C