A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) （）.

A.dead-reckoning position
B.running fix
C.estimated position
D.fix

A.fix
B.dead-reckoning position
C.running fix
D.probable position

A.plane tangent at one point
B.cylinder tangent at one parallel
C.cone tangent at one parallel
D.series of cones tangent at selected parallels