Which helicopter can accommodate 15 litters and attendants for medical evacuation?

The CH-53D Sea Stallion is recognized for its significant cargo capacity and versatility, which makes it an ideal choice for medical evacuation scenarios. It can accommodate up to 15 litters along with necessary attendants, allowing it to effectively transport multiple patients in a single mission. This capability is particularly valuable in military operations where quick and efficient evacuation of the wounded is paramount.

The other helicopters listed typically have different configurations and missions. The CH-46E Sea Knight, while also suited for transport and medical evacuation, has a slightly lower capacity in terms of litters when compared to the CH-53D. The AH-1W Cobra is primarily an attack helicopter and lacks the necessary space and configuration needed for efficiently carrying litters. The MV-22B Osprey serves as a tilt-rotor aircraft that provides both vertical lift and speed but has a different role and may not be optimized to carry the same number of litters as the CH-53D.

Thus, the CH-53D Sea Stallion stands out for its specific and robust capabilities in accommodating a higher number of litters and medical personnel for evacuation purposes.