Which helicopter is designated as the CH-53D within the United States Marine Corps?

The CH-53D is designated as a cargo transport helicopter within the United States Marine Corps. This helicopter is specifically designed to carry heavy payloads, making it essential for logistical operations and troop transport. Its robust design and powerful engines enable it to lift significant weights, including military vehicles, supplies, and personnel.

The CH-53D's capabilities allow it to operate effectively in a variety of environments, thus enhancing the Marine Corps' ability to conduct operations that require rapid deployment of resources. The helicopter's role in cargo transport is critical, especially in combat situations where timely resupply and troop movements are crucial for mission success.

In contrast, other types of helicopters serve different purposes, such as conducting search and rescue missions or engaging in attack roles, which do not align with the primary function of the CH-53D.