thanks
yes there's a walkway over to the deck in the waterView attachment 15138
The OP didn't say it wasn't a pool. He only said "no boats".
And even if it was a pool, I can't tell from the photo that was provided how people get onto the wooden platform. Is it a small bridge. and does the bridge have a barrier that we can't see because objects are in the way?
Not enough info provided by the O.P.
Here in California, there is a requirement in 11B-247.1.2.6 for detectable warnings on "reflecting pools", but there are no other explicit requirements for guards adjacent to water.
Again, referencing my own state's code, the CBC 202 definition of "grade" is specific to "ground, paving or sidewalk".
GRADE (Adjacent Ground Elevation). [DSA-AC & HCD 1-AC] The lowest point of elevation of the finished surface of the ground, paving or sidewalk within the area between the building and the property line or, when the property line is more than 5 feet (1524 mm) from the building, between the building and a line 5 feet (1524 mm) from the building. See Health and Safety Code Section 19955.3(d).