As shown in the figure, point B is BD⊥AC, and the extension line of AC is at point D,

In Rt△ADB,

∫∠BAD = 30，

∴BD=

1

2

AB= 150m，

At Rt△CDB,

∫sin∠DCB =

decibel

B.C.

,∴BC=

Bachelor of science

sin∠DCB

=

150

sin60

=

300

three

≈ 173m，

A: At this time, the distance BC between the cruise ship and Wanghai Building is about 173m. ..