5.5m

6.5 m

7.5 m

8.5m

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i)and(iv)

stop

proceed

proceed cautiously

none of the above

both arms are horizontal

semaphore arm lowered but warner arm horizontal

both semaphore and warner arms lowered

none of the above

stop

proceed

proceed cautiously

none of the above