Notices
Like Tree27Likes

Let's Discuss Altimetry

Old 03-09-2018, 06:40 PM
  #21  
Senior Member
 
Join Date: Jun 2010
Location: Snuggedy Swamp & North Eleuthera
Posts: 3,940
Default

Dolphin44 AKA Sham a Lamma Ding Dong,

If I was fishing in a Wahoo tournament off of Jax, I'd head directly to a 140' and start fishing and I don't know a dang thing about Altimetry.

I do know a decent amount amount about what attracts and holds fish. Altimetry has never been in the mix.
Ironworker is online now  
Old 03-09-2018, 06:54 PM
  #22  
Senior MemberCaptains Club Member
 
Join Date: Apr 2004
Location: Raleigh, NC & Hampstead, NC
Posts: 2,794
Default

In my experience wahoo are most found over structure. Up here off SE NC we fish the rocks on the break and we are 65nm to the break.
aftergolf is offline  
Old 03-10-2018, 07:01 AM
  #23  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2006
Location: Cape Cod
Posts: 1,545
Default

One note on Altimetry, according to Roffer's Offshore Forecast the Satellites that collect the altimetry data take 7-10 day to process and get to the end user (us). So much of the data is dated by the time you get it and may not line up with other data like SST.
mr buck is offline  
Old 03-10-2018, 07:55 AM
  #24  
Senior Member
 
Join Date: Feb 2011
Posts: 1,155
Default

Originally Posted by dolphin44 View Post
HurricaneBK, good question ! I will try and explain what my thoughts are. Again, not scientific ! In the middle of an "Upwelling" you have all these nutrients, microscopic creatures and baitfish being pushed to the surface in a centralized locale. Picture these nutrients being pushed to the surface and then pushed outward to calmer areas. These calmer areas are the transition areas where the nutrients, microrganisms ,and baitfish cluster and are "MOST PRONOUNCED, before being dragged back down in a "downwelling". They are gathered there because there is where an area of calm ( for them ), exists.

Your thoughts about the middle of an upwelling certainly has merit. But trust, as I do, the marine scientists who study this for a living.

I hope my explanation helps. I have fantastic numbers for the NW Providence Channel. I fish there often.

Send me a PM with your cell number, and I will share my yellowfin numbers with you, as well as text you a screenshot of the NW Channel Altimetry. I am sensitive not to violate my subscription to Rip Charts, as they are an extremely honest, very helpful, and extraordinarily reasonably priced service.

If you would like a personalized demo, go online, google Rip Charts, and ask for Chris to get back to you. They have been so helpful to me. Note, I do not have any financial arrangement with Rip Charts for my recommendations. They have more than earned my referrals.
Sounds reasonable, although I'm not thoroughly convinced. I know if I was a small pelagic fish feeding on plankton rising through the water column I'd probably want to be right where they're thickest and gorge myself - granted I'm not a pelagic baitfish though, thankfully I might add, they have it rough.

PM sent
HurricaneBK is offline  
Old 03-10-2018, 06:12 PM
  #25  
Senior Member
 
Join Date: Jul 2015
Location: Lafayette, LA
Posts: 348
Default

There is a simple ratio that one must consider when targeting any fish but pelagics especially, calories consumed/calories expended. Bait congregates on the outside of an upwelling because there is less current to swim against and the nutrients are spun out to these areas by the upwelling.
CNBarron is offline  
Old 03-11-2018, 07:56 AM
  #26  
Senior Member
 
Join Date: Jun 2016
Location: Sebastian Fl.
Posts: 365
Default

CNBarron. Great explanation of why we fish the transition areas of upwellings. Thank you. Capt. Billy/Right Stuff
dolphin44 is offline  
Old 03-12-2018, 06:10 AM
  #27  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Sep 2016
Location: Jacksonville Beach
Posts: 317
Default

Originally Posted by dolphin44 View Post
I have NEVER fished off Jax. That being said, if I were fishing the wahoo tournament tomorrow, I would fish a course between the following sets of coordinates. I plotted this course for sh--s and giggles.

30.21.05
80.20.15
AND
30. 5.46
80.22.38

My starting #'s are approx. 55 miles east of Jax. in around 140+- ft of water. This plan gives me a water temp. range of 74 degrees to 76 degrees. Water clarity is okay.

Inside the edge of the stream, there is a se current against the ssw flow of the stream.( wind blows from and the tide flows to ) This might provide some nice eddy's as well as weedlines.

In the northern hemisphere, some recommend trolling against the current. I focus on this, but have caught fish trolling in different directions. I always try and mentally record my heading at the time of fish strikes.

I did my "hunting" this morning using "Rip Charts".

JaxBch, and others, I would welcome your comments on my proposed trolling plan. As I said, I've never fished off Jax. before, and your critique would be very welcomed.

Ironworker, I hope all of the above posts help you catch more wahoo. All this info certainly puts the " Bop shoe Bop Ba Bop" and the " Sham in the Sham a Lamma Ding Dong" into fishing strategies.

Wishing all who are fishing the wahoo tournament tomorrow, the very best of luck. ( notice, even using all the posted info, luck is still part of the formula.) Have a fun and safe tournament. Capt. Billy/Right Stuff
Well. Your plan was very similar to ours. Sorry for delay, I did not want to discuss strategy prior to fishing. We have some areas around your plotted course that consistently produce fish. However, Saturday was not the day for us. We did not have a single wahoo hit. The radio was all but silent and it was a parking lot out there. We had no problem finding the right temp water. HST till about 11 am and then switched to meat. Back to HST around 4.

During the middle of the day we headed out to the temp break which was in about 250ft of water to find scattered weeds, no birds, and nothing worth trolling.




Above is a shot from 3/10. I feel like the altimetry did play a role in the lack of fish. Admittedly, it's rare to see a nice blue upwelling inside the ledge, but I feel like this was an exceptionally bad downwelling. I also wonder if the nice blue upwell to the east pulled the wahoo further offshore?

Last edited by JaxBch; 03-12-2018 at 06:28 AM.
JaxBch is offline  
Old 03-12-2018, 06:20 AM
  #28  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2010
Location: Pompano Beach, FL
Posts: 11,905
Default

I wish my old Cuban uncle Santiago was still around to shed some light on this. He was a fisherman all his life, and even caught a giant Marlin once. He fought it for days!

I remember finding an old Altimetry book in his possessions.

Texasblue likes this.
Jus Teasin is online now  
Old 03-12-2018, 06:34 AM
  #29  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Sep 2016
Location: Jacksonville Beach
Posts: 317
Default

Originally Posted by Jus Teasin View Post
I wish my old Cuban uncle Santiago was still around to shed some light on this. He was a fisherman all his life, and even caught a giant Marlin once. He fought it for days!

I remember finding an old Altimetry book in his possessions.

You failed to mention that one year he couldn't catch a single fish for 84 days.

I saw his altimetry book too, it said during that 84 days there was a huge downwelling and he couldn't catch a damn thing. He also noted that his fuel bill was outrageous, buring all that fuel with no fish to sell at the market.
Texasblue likes this.
JaxBch is offline  
Old 03-12-2018, 07:46 AM
  #30  
Senior Member
 
Join Date: Feb 2011
Posts: 1,155
Default

Originally Posted by JaxBch View Post
You failed to mention that one year he couldn't catch a single fish for 84 days.

I saw his altimetry book too, it said during that 84 days there was a huge downwelling and he couldn't catch a damn thing. He also noted that his fuel bill was outrageous, buring all that fuel with no fish to sell at the market.
well played
HurricaneBK is offline  
Old 03-12-2018, 07:47 AM
  #31  
Senior Member
 
Join Date: Jun 2010
Location: Snuggedy Swamp & North Eleuthera
Posts: 3,940
Default

Uncle Santiago should have gone to the Flemish Cap. That's were the fish are.
N2theblue likes this.
Ironworker is online now  
Old 03-12-2018, 07:50 AM
  #32  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2010
Location: Pompano Beach, FL
Posts: 11,905
Default

Jus Teasin is online now  
Old 03-14-2018, 06:12 AM
  #33  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Sep 2016
Location: Jacksonville Beach
Posts: 317
Default

Was hoping Capt Billy would chime in about the screen shot. Would it be beneficial if I posted all of the data from 3/10?
JaxBch is offline  
Old 03-15-2018, 01:58 AM
  #34  
Senior Member
 
Join Date: Jun 2016
Location: Sebastian Fl.
Posts: 365
Default

JaxBch, I appreciate your posting the screen shot. Looks interesting. I did some jetty fishing yesterday, and have to spend time today getting ready for a trip on fri.

I find the sharing of info and ideas very thought provoking and helps us all become better fisherman. Even if we do not fish the same waters.

Studying charts and the strategies of others is all part of the hunt and of course part of fishing.

I do enjoy the "Santiago " postings , as humor should be part of a recreational sport.

I will study your screen shot later today and make comparisons to Rip Charts' present Altimetry chart.

Thank you again. It's all good stuff. Capt. Billy/Right Stuff
dolphin44 is offline  
Old 03-15-2018, 07:28 PM
  #35  
Senior Member
 
Join Date: Jul 2010
Posts: 945
Default

I just wanted to thank all of you for giving me a better understanding of altimetty . I've heard it was important before but rarely have I seen upwelling anywhere near where I fish. Ga coast. They are usually too far offshore.
x4man514 is offline  
Old 04-15-2018, 06:48 PM
  #36  
Admirals Club Admiral's Club Member
 
Join Date: Jun 2016
Posts: 652
Default

Just purchased a premium Ripcharts subscription and was sure happy to find this thread. I have been able to understand many of the other variables that are available but was struggling with Altimetry. I've been on all the free sites for about a year and have focused on trying to learn what the experienced guys look for. Last time offshore we bought a "Fish Here" map. We did not catch fish but the conditions that lead them to recommend that area were spot on. I spent days studying why they recommended the places they did and learned exponentially. Dolphin44- awesome job explaining altimetry.
Eric Minnis is offline  
Old 04-15-2018, 07:02 PM
  #37  
Admirals Club Admiral's Club Member
 
Join Date: Nov 2009
Posts: 1,029
Default

Originally Posted by JaxBch View Post
Well. Your plan was very similar to ours. Sorry for delay, I did not want to discuss strategy prior to fishing. We have some areas around your plotted course that consistently produce fish. However, Saturday was not the day for us. We did not have a single wahoo hit. The radio was all but silent and it was a parking lot out there. We had no problem finding the right temp water. HST till about 11 am and then switched to meat. Back to HST around 4.

During the middle of the day we headed out to the temp break which was in about 250ft of water to find scattered weeds, no birds, and nothing worth trolling.




Above is a shot from 3/10. I feel like the altimetry did play a role in the lack of fish. Admittedly, it's rare to see a nice blue upwelling inside the ledge, but I feel like this was an exceptionally bad downwelling. I also wonder if the nice blue upwell to the east pulled the wahoo further offshore?
We fished the same tournament. There were 92 boats in it. It was a nice day on Saturday, but everyone was fishing for second place after Friday's catch of a 164#s. We came in 20th and caught three Wahoo. All three of them came in the yellow downwelling on the above map. I think the fish held to larger bottom structure inside the ledge. Just thought i would add this to the discussion.
batt3669 is offline  
Old 04-16-2018, 06:30 AM
  #38  
Junior Member
 
Join Date: Aug 2016
Posts: 17
Default

So how long does it take for the the downwelling and upwelling to equalize? Will the altimetry charts you look at the night before heading offshore still be accurate the following day?
OneOnTheHead is offline  
Old 04-16-2018, 06:42 AM
  #39  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2006
Location: Cape Cod
Posts: 1,545
Default

Originally Posted by OneOnTheHead View Post
So how long does it take for the the downwelling and upwelling to equalize? Will the altimetry charts you look at the night before heading offshore still be accurate the following day?
By the time you see an altimetry chart it is already a week old.
mr buck is offline  
Old 04-16-2018, 07:07 AM
  #40  
Senior MemberCaptains Club Member
 
Join Date: Apr 2004
Location: Raleigh, NC & Hampstead, NC
Posts: 2,794
Default

How do you know that it is not the day before shot?
aftergolf is offline  

Thread Tools
Search this Thread