The Royal Saudi Naval Force frigate Makkah (814), back, and the guided-missile destroyer USS Winston S. Churchill (DDG 81), not pictured, provide overwatch as the Royal Bahrain Naval Force patrol warship Al Zubara transits the Bab el-Mandeb Strait, Nov. 20. The International Maritime Security Construct (IMSC) maintains the freedom of navigation, international law and free flow of commerce to support regional stability and security of the maritime commons.