There is one exception we must inform you of as you go, so far as simply going through the motions to get to the above-shown location in order to proceed. And that is the hunt for another Grenade Pack ...

This one's easy to get, no matter how daunting it seems. This might have confounded you earlier in the game, but if you have the Hook, this one is easy-peasy to acquire. Climb the ladder on the left ...