Whether a Vietnam Veteran has or has not been diagnosed with an Agent Orange type health challenge, but was exposed to it, he/she should be registered with the VA. There is no cost but significant possible benefit. You can still apply for disability compensation if you were exposed to Agent Orange.
HELPFUL INFORMATION WHEN FILING A CLAIM
The following ship list was downloaded from the following section of the VA Website: https://www.benefits.va.gov/compensation/claims-postservice-agent_orange.asp
Page 31 of this list states that USS Cleveland (LPD-7) [Amphibious Transport Dock] sent Naval Academy Midshipmen on training mission ashore at Da Nang on 9-10 July, 1970