VISUAL AIDS TO NAVIGATION


1. 2.


Name the key categories of mark which make up the IALA buoyage system. Describe three key features that enable navigation marks to be distinguished from each other. 3. What does this chart symbol signify?


4.


Below are two extracts from the training charts. Identify which IALA system each is using.


i) 5.


ii)


Identify which buoy you could expect to see with the following topmark shapes. Describe the following for each of the marks.


i) Colour(s) and shape of the buoy ii) Colour(s) and sequence of the light iii) The purpose of the buoy


a)


b)


c)


d)


e)


f )


g)


h)


i)


j)


37


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