File:Map of Zanzibar.png

Summary
Map from Wikipedia https://commons.wikimedia.org/wiki/File:Map_of_Zanzibar_Archipelago-en.svg shows Unguja (informally called Zanzabar) and it's sister island Pemba. Note Japanese main naval base in Menai Bay and the main airfield on the south west corner of the island SOH HB. P. 1. It is probable that the small islands are joined somewhat and possibly to the main island.