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Catalina/Capri 25/250 Sailor's Forums

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Tidal fill as a math function

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JimGo
Admiral

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USA
962 Posts

Response Posted - 02/21/2012 : 12:25:49

John,
Thanks for the detailed reply. I built an A-frame this past Fall and realized that taking down the mast wasn't all that unpleasant. I want to raise the mast again before I head out, just to be sure everything is OK (the current marina has a lift). What I may do, though, is to drop the mast at the Southern end of Barnegat bay.

I'll have to look at DavyJ's set-up again. It might be advantageous to make a few of the changes he's made to streamline the dropping of the mast.

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 02/21/2012 : 13:00:10

Jim,
Back to your original question. Did you ever write a function to calculate your tides? I wrote one for the HP 48 a few years back, but it was by no means automated, you had to have a tide table to calculate your depths.

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JimGo
Admiral

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USA
962 Posts

Response Posted - 02/21/2012 : 14:13:26

David,
I haven't yet. I found the NOAA site linked to on the first page, and that gave me a close enough approximation for my purposes (the graph they put up is pretty good). Its on my "to-do" list, though. Unfortunately, that list is pretty long!

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Arlington
Navigator

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USA
196 Posts

Response Posted - 02/21/2012 : 14:31:57

Jim To keep from going broke, I had to prioritize my to do list like this:
A- keeps boat from sinking
B- necessary to sail or sell the boat
C- Admiral wants it
D- It sure would be nice
E- I really want to...
* no accessories, parts or supplies will be purchased until I am actually ready to do the job.
Doug

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JimGo
Admiral

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USA
962 Posts

Response Posted - 02/22/2012 : 06:34:45

Doug,
I like those priorities! I have a few on-going projects, and need to finish them before I can start the application. My projects aren't just boat-related, though. I owe my son half a bed (bunkbed), need to make cabinets for a mudroom, take down paneling in our family room and put up sheetrock, paint, finish cleaning up the tree that fell in our yard...

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 02/22/2012 : 07:21:04

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by JimGo
 My projects aren't just boat-related, though. I owe my son half a bed (bunkbed), need to make cabinets for a mudroom, take down paneling in our family room and put up sheetrock, paint, finish cleaning up the tree that fell in our yard...<hr height="1" noshade id="quote"></blockquote id="quote">

My wife knows that major, and minor, household projects are only getting done in the off season. This off season I redid the hardwood floors in the bedrooms, remodeled a bathroom, painted a few rooms, and will be installing a tile floor in the kitchen before the tarps come off the boat, because when boating season begins, my wife has a hard time getting me to mow the lawn or even changing a light bulb.

A man's got to have his priorities!

Edited by - dlucier on 02/22/2012 07:58:34

Arlington
Navigator

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USA
196 Posts

Response Posted - 02/22/2012 : 07:57:12

I try to get the home projects done as quickly as possible...so I can get back to the boat.

Jim I had to replace the rails on a bunk bed that was supposed to be virtually indestructible. I forgot to tell 3 twelve year old boys and the bed frame failed within the first 5 minutes. Second, who ever put all that wood paneling in our den's had to be laughing during the entire installation.
Doug

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JimGo
Admiral

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USA
962 Posts

Response Posted - 02/22/2012 : 08:07:58

Doug, I feel the same way about the paneling. The stuff is so dark, it's like it just sucks the light out of the room! My wife wanted to just paint it, but I can't do that for the family room. If it comes down in one piece, I'll use it to create a basement play room for my kids (with the paneling getting a healthy coat of paint!), but I don't want it in my family room/den.

I pulled the companionway covers and rails for the pop-top off the boat this past weekend (along with a lot of the interior teak from the main part of the cabin) and have spent the last several nights working on finishing those. Once that's done (hopefully by this weekend), I'll need to get back to my other, house-based projects!

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Frank Law
Navigator

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USA
159 Posts

Response Posted - 02/22/2012 : 10:56:18

Rick--- If you keep a boat in Georgetown (213) It will take you 1+ hours to the Bay ,Motoring . Out Past Ordinay POint and Turners creek The river is quite sailable being being well over a mile wide and deep water. The wind is mostly out of the west/Southwest so you do a lot of tacking getting to the bay..There is considerable big power boat traffic on the weekends and there is no speed limit . If you want to be closer to the bay , then You will have to go to Worton creek --3 marinas-------Great Oak -----or Tolchester . The Bohemia River is Closer to open water of the bay than the Sassafrass . But you can sail to the bay from the Bohemia .
We have a camper off the Sassafras which takes us 1:45 hrs to get to.
Frank Law
"ABOUT TIME"
1983 3519
swk , sr

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TakeFive
Master Marine Consultant

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2272 Posts

Response Posted - 02/22/2012 : 22:16:41

Frank - We rode down to Bohemia a few weeks ago, and decided that it (and any other locations further south) is too long a drive for this summer. We'll reconsider next season.

Jim and David - Re: the original topic, you can purchase "tidal clocks" that have a single hand that rotates according to the lunar cycle, and give a rough prediction of high and low tides. I decided not to purchase these, and instead wrote an Excel spreadsheet that serves the same function. (It uses a sinusoidal function to interpolate between high and low tides.) It also runs on my Blackberry using the Documents to Go app. Send me your email address and I'll forward it to you if you're interested.

However, I have not used it in the past year. I found it easier to just print out the [url="http://tidesandcurrents.noaa.gov/tide_predictions.shtml?gid=110"]NOAA tide and current tables[/url] for each month.

David - FYI, we're planning to fly out to Seattle in early August to visit my son.

Edited by - TakeFive on 02/22/2012 22:18:58

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