144 



NAVIGATION. 



Storm King of Salem, Messrs Bertram, ran 

 aground whilst hugging Chumbi in order to dis- 

 tance a rival. The number of reefs and shoals 

 render it always unadvisable to enter the port at 

 night, and in the heaviest weather safe riding- 

 ground is found between Zanzibar Island and 

 the continent. 



Vessels from the south making Zanzibar in 

 the N.E. monsoon, the trade-wind of December 

 to March, leave Europa Island to the west, and 

 the Comoro group and S. Juan de Nova on the 

 east. Keeping well in mid-channel, they head 

 straight for Mafiyah. They hug Point Puna, 

 avoiding Latham's Bank, 1 and they work up by 

 Kwale and the Chumbi Island. Ships from the 

 north have only to run down the mid-channel, 

 between Pemba and the continent, and then to 

 pass west of Tumbatu. Those sailing southward 

 from Zanzibar at this season pass along-shore, 

 down the Mozambique Channel. Vessels from 

 the south making Zanzibar in May to September, 

 the height of the S.W. monsoon — the anti-N.E. 

 trade — sail up the same passage. They must be- 

 ware of falling to leeward ; and those that neg- 



1 At Latham's Isle was found guano, which Captain Cogan, 

 I.N., obtained permission to export. In 1847, however, it was 

 washed away by a ' Eas de Maree.' 



