220920-A-JJ498-1143 ARABIAN GULF (Sept. 20, 2022) Royal Saudi Navy ship HMS As-Siddiq (PGG 511) sails with U.S. Coast Guard fast response cutter USCGC Charles Moulthrope (WPC 1141) in the Arabian Gulf, Sept. 20, during the International Maritime Security Construct (IMSC) exercise Sentinel Shield. Sentinel Shield is a monthly exercise series conducted by IMSC to enhance communication and coordination among partner naval forces.