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Buzz View Drop Down
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Posts: 101 		Post Options Post Options   Quote Buzz Quote  Post ReplyReply Direct Link To This Post Topic: Garmin GPS 72H
    Posted: 14 Jul 14 at 4:42pm
Could anyone recommend where I could find a detailed set of instructions on how to use the above GPS please. The manual that comes with it is useless. I want to use it for laying marks.
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Brass View Drop Down
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Posts: 1151 		Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 14 at 4:02am
https://support.garmin.com/support/manuals/searchManuals.faces

See, that wasn't so hard to Google was it?
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Buzz View Drop Down
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Posts: 101 		Post Options Post Options   Quote Buzz Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 14 at 10:28am
My original post was prompted by the lack of detail in the Garmnin getting started manual and the owners manual both of which which I downloaded when I got the GPS. I was hoping that someone might know for have a really detaied manual or book. I have also looked through numerous YouTube videos but I was unable to find what I wanted.
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Medway Maniac View Drop Down
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Posts: 2788 		Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 14 at 10:38am
Originally posted by Buzz



My original post was prompted by the lack of detail in the Garmnin getting started manual and the owners manual both of which which I downloaded when I got the GPS. I was hoping that someone might know for have a really detaied manual or book. I have also looked through numerous YouTube videos but I was unable to find what I wanted.

Sounds like the usual story with Garmin GPS. I have usually found a website where someone describes the functions and tricks, at least for the cycling products, but the manuals are hopeless.

Otherwise, it is just the use of trial and error and intelligence, I'm afraid, unless you're lucky enough to meet someone with the same unit.
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winging it View Drop Down
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Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 14 at 9:25pm
We did a mark laying course using these not very long ago, I got a handout with it which could be scanned and forwarded.  Pm me your email address?
the same, but different...

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Brass View Drop Down
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Posts: 1151 		Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 14 at 1:49am
I'm not sure that it's the keystroke sequences you need.  Mark laying with a GPS doesn't need any very sophisticated use of the GPS.  You can get by with just Pinging a position, setting GO TO and display of bearing and distance to a waypoint.  Using Project Location is a bonus.

You can't expect the Garmin manuals to tell you how to use a GPS to lay marks, that's what your RYA RO or mark layers course will do.

The ISAF Race Management Manual (RMM) contains all you really need to know.

Marks can be laid by GPS using the following methods
  • specific coordinates (RMM L4 ( a ))
  • Bearing and Distance from Reference Point (RP)
-  Sequential Waypoints (RMM L4 ( b ))
-  Bearing and Distance from common RP (Appendix F9)

I prefer the common Reference Point method because it's simplest (very simple for 60 degree triangles and 70 degree trapezoids).

For what it's worth, here's what I do (a real RO or IML may come along and put me right).
  1. Set the GPS to the standard settings (RMM H5)
  2. Edit waypoints and add and delete dummy waypoints as necessary so that the first waypoint you will create on the water, which will be the RP, will have a nice memorable number (on the even tens) and the waypoints you create for each mark, will end with the number of that mark as shown on the course diagram.  For example, suppose you already have 65 waypoints in your GPS, and you are going to use the RC Vessel as the RP.  Create and delete Waypoints 066, 067, 068, and 069, so that the next waypoint that you create will be 070.  You will thus be using the '70s' for your mark waypoints for the day.
  3. Go to the racing area, confirm with the RO that the RC Vessel is anchored in its correct position and Ping the RC vessel (Garmin Manual p 6 To Mark your Current Location).  This will create WP 070.
  4. Set the GPS to GO TO the RP (WP 070), with display showing Bearing and Distance to the waypoint.
  5. Get the approximate wind direction and expected windward leg length from the RO.
  6. Bog off upwind until your GPS shows Distance to RP = leg length or a little more.
  7. Drift, observe wind strength and direction and radio report to RO.  Repeat every 5 minutes or when wind changes are noticeable.
  8. Work out the reciprocal of the wind direction bearing and if necessary, manoeuvre your mark boat so your GPS shows this bearing to the RP and distance = the leg length.
  9. When you think the wind is settled, agree the Axis bearing and leg length with the RO, work out the reciprocal of the Axis, and manoeuvre your mark boat so that your GPS shows this bearing to the RP and distance = leg length.
  10. Set the mark, let it settle, check its correct location, then come along side it and Ping it.  It will now be WP 071.
  11. Using the RMM Appendix F9 tables or mental arithmetic, work out the reciprocal bearing and distance from the RP to the next mark to be laid (usually the wing mark).
  12. Go there, manoeuvre to get the reciprocal bearing and distance to the RP right, lay the mark, check and ping it (WP 072).
  13. Repeat for subsequent marks.


Edited by Brass - 16 Jul 14 at 6:14am
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Buzz View Drop Down
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Posts: 101 		Post Options Post Options   Quote Buzz Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 14 at 2:07pm
Brass - thanks for your detailed reply and the link. I have a fair idea what I want to do but lack the detail on how to do it. I am going to see if I can find somone with the same GPS as me to compare notes.
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winging it View Drop Down
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Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 14 at 7:21pm
Actually, it is the correct key stroke sequence that you need, because the 72h is not that intuitive, and if you wZnt yo get the marks laid or moved quickly, knowing the sequence of buttons to press is really helpful.  That's why we were given the handout.  

I'll get it copied and sent.
the same, but different...

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Brass View Drop Down
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Posts: 1151 		Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 14 at 8:17am
Haven't seen the step by steps from Winging It yet.

The procedure I described requires only four GPS functions:
  1. Set Settings into standard ISAF RMM units
  2. Ping a position as a new waypoint
  3. Set GO TO a waypoint
  4. Set up Screen Layout and Data to show Bearing and Distance to a Waypoint.
Additionally, using Project Location to move a Waypoint to a specified bearing and distance from a known position is useful.

I think all these functions are pretty readily discovered from the user manual, but if you tell us which ones you can't do, then we can perhaps help you out.
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winging it View Drop Down
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Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 14 at 11:04am
Ok, finally found my notes.  They are for the Garmin 76, the 72H is basically the updated version and is the unit we actually used.  The notes, from a powerpoint, go through how to set waypoints, clear them and go to them, which is basically all you need.  we then went out and used the reference system, where a boat provides a reference point and you proceed according to which marks you are laying.

I think it's all pretty straightforward, it's just remembering the essential keystrokes under pressure.


Edited by winging it - 21 Jul 14 at 11:07am
the same, but different...

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