USNA SAT/ACT scores have been declining "on average" over the past 3 years, despite a near 60% increase in candidate applicant numbers over the past 4 years. This is a function of aggressive recruiting for specific priority diversity groups and consequent increasing variability in scores. More specifically, more appointments are being made to students scoring lower from specific racial and ethnic groups.
Said more simply and specifically to the OP's question, what is now a "competitive" (not safe ... Craig's explained that well.) score will depend upon which group one is in, i.e. priority diversity or otherwise. btw, women are no longer a priority group.
The point here is in attempting to self-assess one's competitiveness could be sorely misleading in looking only at the USNA profile. Increasingly, there is no "average" USNA Mids. Rather there are now two.