This question involves a “what would you do” for Sea Scout requirements.
Ordinary Rank Requirement 4: Complete the requirements for the Swimming merit badge.
In this example, we have a scout who completed the Swimming merit badge maybe at summer camp when they were 12 or 13, before joining Sea Scouts. Once they join Sea Scouts, do we need to complete the requirements for the Swimming merit badge again or can we presume that the requirement has been met?
Ordinary Rank 10a: (a) Demonstrate your understanding of latitude and longitude. Using a chart, demonstrate that you can locate your position from given coordinates and determine the coordinates of at least five aids to navigation.
Here’s another example where a scout may have completed these requirements before joining the ship (perhaps in a Maritime Explorer Club or some other place). Would the scout need to repeat the requirement in this case?
My gut tells me that if the scout has the merit badge there’s no reason to repeat it, but for something like the second example it should be shown again if only for safety’s sake.
Any other thoughts or official response?