A .303°
B .045°
C .311°
D .056°
[单选题]某船TC356°,1025测得某灯塔TB022°.5,无风流影响,若采用特殊移线定位欲使灯塔正横距离等于两次观测之间的航程,则第二次观测方位应为()。A .086°B .045°C .041°D .056°
[单选题]某船TC357°,测灯塔A的TB330°.5,半小时后又测得A的TB312°,若船速为16kn,则该船与A的正横距离为()。A .8′B .7′C .5′.6D .6′
[单选题]某船TC357°,测灯塔A的TB23°.5,半小时后又测得A的TB42°,若船速为14kn,则该船与A的正横距离为()。A .8′B .7′C .5′.6D .6′
[单选题]某轮TC265°,测得某灯塔TB291°.5,航行12nmile后,又测得该灯塔TB310°,则船与该灯塔正横时距离为()。A .10nmileB .12nmileC .15nmileD .13.2nmile
[单选题]某轮TC310°,测得某灯塔TB283°.5,航行10nmile后,又测得该灯塔TB265°,则船与该灯塔正横时距离为()。A .10nmileB .12nmileC .15nmileD .13.2nmile
[单选题]某船ΔL=-6%,0800时L=100′,TC=352°,测得某灯塔真方位014°.5,0830时L=108′.0,再测得该灯塔TB=037°,风流很小,忽略不计,则该灯塔正横距离等于()。A .8′.5B .5′.3C .7′.5D .6′.0
[单选题]某船ΔL=-6%,0800时L=100′,TC=037°,测得某灯塔真方位014°.5,0830时L=108.′0,再测得该灯塔TB=352°,风流很小,忽略不计,则该灯塔正横距离等于()。A .8′.5B .5′.3C .7′.5D .6′.0
[单选题]某轮TC265°,测得某灯塔CBCB237°,罗经差-1°.5航行10nmile后,又测得该灯塔TB220°,则船与该灯塔正横时距离为()。A .10nmileB .12nmileC .15nmileD .13.2nmile
[单选题]某轮TC325°,船速15kn,1200测得某物标TB351°.5,1220又测得该物标TB010°,则预计正横该物标的时间和距离为()。A .1230;5nmileB .1230;4nmileC .1240;5nmileD .1240;4nmile
[单选题]某轮TC325°,船速12kn,1200测得某物标TB298°.5,1230又测得该物标TB280°,则预计正横该物标的时间和距离为()。A .1240;6nmileB .1250;5nmileC .1300;5nmileD .1300;6nmile