(a)[1]
Find the harbour's bearing from boat $C$.
(b(i))[1]
Show that angle $CBH$ is $100^\circ$.
(b(ii))[3]
Show that $BH = 13.7$ km, rounded to 1 decimal place.
(c)[5]
Calculate the bearing of $A$ as seen from $B$.
(d(i))[4]
Calculate the time at which boat $C$ reaches the harbour. Give the time correct to the nearest minute.
(d(ii))[3]
Calculate the distance from boat $C$ to the harbour when boat $C$ is at its shortest distance from lighthouse $B$.