I could see this as a 65. The only thing causing a second guess is the chatter in the field below AME on the reverse. If it's a 64 it would be a solid 64 in my opinion.
MS 64 I also see chatter in various areas which would likely keep it out of 65...nice animation to show off the luster!
Nice coin and I agree the luster graphic was neat. So many of the classic commems have ships in the design.
65, is sorta like a catch-all grade at PCGS for commems it seems. Kinda like 63 is a catch-all for most other series, Silver Dollars especially. Either that, or the blown up images and lighting is bringing out more flaws than you would see in-hand. Nice coin though, and THIS one appears to be worthy of the grade imo