Topic: how many waypoints can you really have at once?

[jwilson48]

okay so one of my fishfinders (humminbird 727) can store 750 waypoints. the other humminbird 798ci hd si can store 2500. i already have a little over 700 downloaded onto them just from 3 local lakes and have many many more i would like to put on them. if i have say 700 waypoints on my 727 and say an additional 1000 waypoints on a sd card, will it work in my 727? or will it only work in my 798? thank you this is my first post i have been using lowrance and am tired of them so i bought a new 798 and a used 727 to get rid of them. now that i have the side imaging i plan on really trying to find new brushpiles and there are a bunch of other lakes that i haven't fished much that i am planning on fishing more in the future. also curious anytime i mark a spot will it automatically mark on my unit or can i mark it on the sd card without having to export it to it? thank you very much.

[jwilson48]

anybody?

[newkid4si]

jwilson48
   The answer to your first question will probably be on Monday when Greg checks in.
   The second-- I have a 998 and when recording or snapshot, it goes to the SD card without exporting.

               Mike

[LocDown]

Wow, that's a lot of waypoints for 3 lakes. I'm not sure if you're running the software that has the waypoint management feature in it that you can turn off waypoints you don't need. If some of the waypoints are in the same "cluster" area, do you really need X amount of them?

[jwilson48]

a lot of the waypoints i downloaded the coordinates from the conservation department. some of them i have never even fished (still working on it) but i don't want to lose them as there are a lot that really do hold fish very well. i almost wish i would have bought another unit for the front because i didnt realize the 727 could only have 750 waypoints. thank you for the help. i have followed this site a lot for the last month or so, trying to learn as much as i can. seen some really neat stuff today on the water with my new side image, although it seemed like the item had to be fairly big to show the detail i wanted. still have some more playing to do with it.

[ITGEEK]

If you press mark, it will only save that waypoint in your system,
not on your SD card.

You might want to seriously consider having a separate SD
card for each of the lakes/waters you fish.

Before a fishing trip, erase all on the unit, then load in
just what you need from the approprate SD card.
After each fishing trip, export all on the unit to the appropriate
SD card (in case you added any new ones).

Every waypoint is going to take up memory, which is going to slow down
your system.  I think you could run into problems if you completely
fill up all the internal waypoint slots.

Many problems with the machines are because of corrupted waypoints.
Especially, problems when doing software updates.
The more waypoints you have, the easier it is for at least one to get corrupted.
I think it only takes one corrupted waypoint to lock up a system.

[Jim Jack]

Every waypoint is going to take up memory, which is going to slow down
your system.  I think you could run into problems if you completely
fill up all the internal waypoint slots.

Is the architecture of the HW really such that WP,Track, and Route storage is shared with processor memory? This would be the only reason that the # wp's and such would affect processing performance.

I do not think that this is true, I think that WP's,Track. and routes are in their own storage and that is not used as RAM memory. This is how HB was able to add the Format Nav Directory function. 

[ITGEEK]

You might be right, I'm not sure.
I think the more of anything you have on your
system, the more it will slow it down.
Every icon for each waypoint you see on your screen takes
up memory.

I used to have hundreds of waypoints.
Then, I split them up into separate SD cards.
My system seemed to be more responsive
after that.

[Humminbird_Greg]

Not sure what would happen if you used the memory card with 1,000 waypoints on it in the 727 unit that already has 700 waypoints on it.  I have never tried to overload a unit with waypoints before.

When you mark a waypoint it is saved internally within the unit’s memory.  If you have the Screen Snapshot feature turned on the unit will also save a *.png picture file to (only) the memory card in your unit.

I would do like ITG suggested and have a separate memory card for each lake.  A little more work this way but than you would have the waypoints that you need, plus you should be keeping a back-up file of your unit’s waypoints, by lake, on your computer in case something happened.