Complex sentence: The "Avenger"-class ships are equipped with four Waukesha-Pearce diesel engines (MCM 1 and 2) or Isotta-Fraschini ID 36SS6V diesel engines (remainder), which are designed to have very low magnetic and acoustic signatures.
Split into simpler sentences: The "Avenger"-class ships are equipped with four Waukesha-Pearce. Diesel engines (MCM 1 and 2) or Isotta-Fraschini ID 36SS6V Diesel engines (remainder), which are designed to have very low magnetic and acoustic signatures.