CAMILUS EBOH and LIBBY GEORGE NIGERIA’S navy plans to strengthen its measures to root out and punish personnel who collude with kidnappers and criminals, its new naval chief said. Kidnappings in the Gulf of Guinea, which covers 2.3 million sq km and borders some 20 countries, hit a record last year, according to the International Maritime Bureau. Well-armed, violent pirates operate there out of Nigeria's hard-to-police Delta swamps, and experts say their increasingly bold tactics show that better enforcement is badly needed. Rear Admiral A.Z. Gambo, who was appointed as Nigeria's naval chief of staff last month, said he would…