Re: Planning a trip up the East River, Timing?
Down, Yes, 2 hours after low tide at the battery is the general rule of thumb. However, as you've ascertained you can enter 4 hours later and still catch a favorable current. I think you can enter even a little later than that.
Take a look at Eldridge and the currents in New York harbor beginning on page 128 of this years book.
It's a 15 mile trip. With the 7 or 8 kn. over ground that you could acheive going with the full flow the whole trip only takes about 2 hours. ( to the throgs neck ).
So if you enter with the flow @ 10 am...should be at the throgs neck by noon. I usually plan for a 2 hour transit.