For COD aircraft conducting a straight-in approach from port holding, how far should they be established AFT of the ship at what altitude?

Answer: B — 3 NM / 600 feet

For COD aircraft conducting a straight-in approach from port holding, being established at the appropriate distance and altitude is crucial for ensuring a safe and effective landing. The correct choice indicates that these aircraft should be 3 nautical miles (NM) away from the ship and at an altitude of 600 feet when they are established for the approach. This distance and altitude allow the aircraft to safely configure for landing while maintaining a proper glide slope towards the deck. The 3 NM separation provides sufficient time and space for the pilot to assess the landing area, make necessary adjustments in speed and configuration, and ensure alignment with the ship. Establishing the aircraft at 600 feet is in accordance with standard operating procedures, giving the pilot an adequate margin to execute a controlled descent while being mindful of any operational hazards. This altitude also aligns with typical requirements for maritime operations, where visual reference and wake turbulence can affect the aircraft's behavior close to the ship.