Is contribution to USCG National Museum considered a "veteran's group" - for 30% limit?

"The National Coast Guard Museum Association, Inc, is a Section 501(c)(3) nonprofit organization to raise funds and awareness in support of the National Coast Guard Museum" 

This means that it is not a "veterans group" in the eyes of the IRS.

This means that the Association, per se, is a charity in the eyes of the IRS, so any contributions to the Association can be deducted in full, to 50% of your income for the year 2024.