Thanks they probably walked on it that’s why one of the boards are brokenAyuh,.... It'll dent if ya do,....
I could stiffen it with some Ash steam bent at every 6 inch but that’s to long of a project I will only do the 3 that are there for now if i see the need to walk on it I will rib it like the bottom of a river canoe but a hundred pound person could probably walk on it with no problemsDad had a similar Mirrocraft with a closed bow like your pic. as a small scrawny kid, I could sit/walk up there. however as I came into my teens and started eating like a horse, it flexed too much.
If you want to walk on it, there are ways to stiffen it, however requires flipping the boat and using 8# density foam and some additional bracing