You need to
purchase and study an
Eldridge Pilot Book
It has all the info you need
In short if going southbound from
Long Island Sound
You want to be under the ThrogsNeck Bridge
One Hour Before "Slack before Ebb" at Hell Gate
If you do this you will transit Hell Gate at Slack then ride the
southbound ebb all the way to Sandy Hook
Just did LIS to Cape May
Cruising by the Statue of Liberty is Fantastic
Cheers
Neil