Not only is it exceptionally useful, it's joy to read with helpful pearls of wisdom like how to "heave the lead". Moreover, I love its familiar yellow cover, antique serif type and the handy ruler down the side.
Every January, I buy two: One for the boat and one for home. It makes great loo reading!
If ever a book was made to be converted into an iPhone, iPad or Android app, it's Eldridge. Imagine, it's 0530, you have just rounded Montauk Point and you need to make a quick decision about whether to head North towards Greenport or carry on to Block Island. You need to know the tidal current through the Race and fast. How great would it be to pop open an Eldridge app that would automatically know where you are and could tell you what the Race will be doing over the next two hours?
OK, it's not that hard to figure it out from the book, but I hope you get my point.
Below are all the sailing apps I currently use. None come close to how useful an Eldridge app would be.
Help me beg Eldridge to create an app by adding your comment at the bottom. Just an "Aye" will do.