Piracy has become increasingly common in the Gulf of Aden , Indian Ocean . Comment: The IMB has tracked at least 11 incidents of actual or attempted piracy near the Tanzanian coast this year . Around 20,000 oil tankers , freighters and merchant vessels use the route annually . A multinational fleet has been patrolling the Indian Ocean and nearby waters .
Piracy has become increasingly common in the Gulf of Aden , Indian Ocean . Comment: Around 20,000 oil tankers , freighters and merchant vessels use the route annually . A multinational fleet has been patrolling the Indian Ocean and nearby waters .