Gulf Islands National Seashores sites open ; some oil detected on beaches . - The Coast Guard is deploying two helicopters to the area, and will be using a drone aircraft for aerial surveillance of the spill site. Pensacola and Perdido Key , Florida , waters open Monday for swimming and fishing .
Gulf Islands National Seashores sites open ; some oil detected on beaches . Health officials have issued an advisory against swimming in Alabama Gulf waters . Pensacola and Perdido Key , Florida , waters open Monday for swimming and fishing .