PMY - Power&Motoryacht

$1,499; www.gostglobal.com

For intrepid cruisers headed toward waters where security is an issue, the GOST (Global Ocean Security Technologies) Acoustic Barrier is a smart investment. A single unit functions as a traditional siren, but installing two or more units creates a sound barrier to stop intruders in their tracks by generating a patented, unbearable noise. The outer casing is made of aluminum and powder-coated steel and features a special additional coating and grid protector for operation in marine environments.