BNRScout

I've searched and read related topics but did not see this question addressed. Please feel free to point me in the right direction if I missed something. I have a scout working on the National Outdoor Aquatics award. They have completed several merit badges that fulfill the requirement for #4 (including: canoeing, kayaking, scuba diving, small boat sailing, whitewater, and fishing). As part of that, they have completed well in excess of 50 hours of related activity (requirement 5). Our question is related to the second part of #4 - Complete 25 hours of on-the-water time applying the skills from the merit badge. It appears that the 25 hours starts counting after the merit badge is earned, correct? In the case of multiple merit badges, I assume that the 25 hours doesn't have to relate to just one merit badge? (i.e., it states complete "at least one" of the merit badges) In the case of multiple merit badges, is that time after each merit badge is completed that is counted? (i.e. first merit badge of the list earned in 7/2021 but fishing earned in 7/2022, any fishing done after 7/21 but before 7/22 would not count) Trying to help the scout figure out the best way to track which merit badges were earned when and what related activity counts. The 50 hours is easy because it includes everything. Thank you for any clarification you can provide.