Explanation:
(a) Three advantages of water transportation are:
(i) Water transportation is the cheapest means of moving people and goods from one place to another:
(ii) Large quantities of goods can be carried at a time over a long distance
(ii) Oceans are free for use by all nations as there are no track to maintain except when approaching par
Three limitations of water transportation are:
(i) It is very slow
(ii) Prevalence of rapids and waterfalls make inland water transportation very difficult
(iii) Fluctuations in the volume of water in inland waterways makes navigation a big problem.
(b) Three ways in which the limitations identified in (a) can be overcome include
(i) Building of modern ships wit greater speed
(ii) Efforts should be made to eliminate the cataracts and rapids along inland navigation to ensure smooth movement of ships
(iii) Dredging of some important inland navigation water-ways should be done in order to ensure deep and large volume of water in these rivers.