Part history, and part hands-on guide for building 18 historic navigation tools. Projects include the kamal, astrolabe, quadrant, cross staff, back staff, nocturnal, sundial, suncompass, pelorus, traverse board, weatherglass, and sextant with vernier. These tools are more than just decorative or educational. They all really work and can be used for navigation. Instructions included. SC, 1994, 192 pages. SW 1.2 lbs.