'Aye, matey, it's naval navigation by geographic means, not astronomical observation'
dead reckoning
D CATEGORY: Aye, matey, its naval navigation by geographic means, not astronomical observation
Aye, matey, it's naval navigation by geographic means, not astronomical observation
Aye, matey, it's naval navigation by geographic means, not astronomical observation
"D" CATEGORY
dead reckoning
"D" CATEGORY