I don't think you'll have a problem. (easy for me to say
) The east side is higher than the west side. We went through at higher than half tide if my recollection is correct. I think the 423's mast was about 57 ft with his vhf antenna. If you go through the west span stick close to the east as it gets lower towards the west, vice versa for the east span. When you get close it's easy to see where the maximum height is.