Object seen approximately 21:00 . object was hovering. white in colour. very distinct edges. centre section became brighter in a vertical line. brighter line split into two and each line traveled to the edge of the object. when line reached end of rectangle the object disappeared. sonic boom heard to objects right hand side in distance. this was in qatar. exact location was lusail marina. at time the marina was being dredged so possible witnesses on dredge boat. very bright in sky. within 500m to mile away. no noise at all.