Complex sentence: Attached to "U" convoy (the western most portion of the fleet), the plan originally called for the task force to operate radar jamming equipment as it approached the French coast, holding 2 miles off shore until first light.
Split into simpler sentences: Attached to "U" convoy (the western most portion of the fleet). The plan originally called for the task force to operate radar jamming equipment as it approached the French coast, holding 2 miles off shore until first light.