Complex sentence: After a while without any answer from the Hospital ship, the HMAS Pioneer was ordered to fire four warining shots from her 102 mm guns, at the same time the HMS Vengeance hung a signal requesting the Hospital ship to evacuate the wounded onboard the ship.
Split into simpler sentences: After a while without any answer from the Hospital ship, the HMAS Pioneer was ordered to fire four warning shots from her 102 mm guns. At the same time, the HMS Vengeance hung a signal requesting the Hospital ship to evacuate the wounded onboard the ship.