2 个月
The Manual on MSNHow to use a compass for navigation when GPS failsIn the days since GPS was invented, many of us have lost the skill of navigating by a good old compass and map. As a family ...
There are other ways of navigation besides by compass, map, or GPS too. Have a shot at inertial navigation if you want a challenge.
一些您可能无法访问的结果已被隐去。
显示无法访问的结果