Wind patterns in the Indonesian archipelago, July


The energy with which ocean wives strike a coastline has a major impact on the form of that coast.  Low wave energy coasts tend to have gentle gradients, are subject to much siltation, and favour the use of small, shallow draught vessels.  High wave energy coasts, on the other hand, tend to demand larger, more robust ships.  A shortage of good harbours on Indonesia's high wave energy coasts has tended to focus shipping on inter island communication. Almost all of Indonesia is outside the cyclonic or typhoon zones in which severe tropical storms can cause enormous destruction.

Further reading

Atlas van Tropisch Nederland. Batavia:  Koninklijk Nederlandsch Aardrijkskundig Genootschap, 1938.

Map number from Cribb, Historical Atlas of Indonesia (2000)