San Diego marine construction and repair firm Marine Group Boat Works (MGBW) and the Fifth Avenue Landing marina are now the city’s newest Foreign Trade Zone activation, it was announced Nov. 12. A Foreign-Trade Zone (FTZ) is a customs territory that expedites and encourages foreign commerce and other purposes. In an FTZ, both foreign and domestic merchandise may be admitted without being subject to formal U.S. Customs and Border Protection entry procedures and payment of duties. Foreign Trade Zone No. 153, which includes 11 operators secured under the U.S. Customs and Border Protection direct supervision, is considered the only FTZ…