it,s not ignorance it’s reality. A realtor lists the property to the best of his knowledge. If a buyer wants to dock a boat there, he needs to do his due diligence. Just like a realtor is not an architect and doesn’t display in the listing that a 1 story house can be made into a second story. It is outside of their scope, expertise, and job. Deep water access simply means there are no fixed bridges, or locks impeding access to the ocean, and you can take a small boat to the ocean, has nothing to do with depth AT the house.