Complex sentence: HMS "Vanguard" (S28) was on a routine patrol in the Eastern Atlantic Ocean with a crew of 135, and was armed with 16 Trident 2 D5 ballistic missiles carrying three warheads each.
Split into simpler sentences: HMS "Vanguard" (S28) was on a routine patrol in the Eastern Atlantic Ocean with a crew of 135. It was armed with 16 Trident 2 D5 ballistic missiles carrying three warheads each.