Pembroke - help requested to recover basking shark jettisoned tag

jumpinjack · 23 October 2012, 21:29

A friend of mine has asked me to post : full details on www.baskingshark.ie Green Marine’s tag has been washed close to the Pembrokshire coast just south of st davids in Wales. We are calling all shark biologists to get in contact with any persons, groups or organisations who operate in the area and might have use of a boat and or kayak to recover the tag. Even persons walking the shore may recover the tag which is yellow in colour and 6 inches long by two inches wide.

Last known position on 22nd October was 51.853N 005.231W

There is a £100 pound reward for the recovery of the tag which holds invaluable information on the movements of the shark it was attached to for the past number of months.

For details Contact Emmett Johnston on 00 353 87 1857980

Razorbill RIBs · 23 October 2012, 21:34

Will pass this to the Pembrokeshire Outdoor Charter Group / Pembs Marine Code Group..... Am working with some of these bods tomorrow......several are regular Kayakers around that area......

SimonStDavids · 23 October 2012, 21:49

The lat and long is pretty near me (porth clais), I will have a look tomorrow if i can get out around high tide.

willk · 23 October 2012, 22:02

This is a genuine appeal from the Scientific Community for real world assistance. The request comes from someone* doing cutting edge shark research and every bit of recovered data helps paint the big picture of where these magnificent creatures go.

*The fact that he is a Redbay owner has in no way influenced my opinion

HUMBER P4VWL · 23 October 2012, 22:30

Best keep posting the position regularly. Someone on here will be near it soon.
Love the benefits of the forum/Internet.
Posted on FaceBook too.

Dhf · 24 October 2012, 02:06

[QUOTE=paulbryson75;495602]

Last known position on 22nd October was 51.853N 005.231W

I would like to help but but need more infomation on location. I'm used to working with degrees, minutes, and seconds, trouble is you don't get 853 minutes in a degree only 60=nm. so i assumed the missing decimals where between 8 and 53 so 51-08.53, and then long being 005-02-31 in which case puts me 14nm West of S Lundy, Or if the long is 005-23.01 that would be approx 28nm W of S Lundy.
I then thought maybe this was grid reference in which case puts me 55km South of Amsterdam.

Is there some other chart reference they use or has someone forgot to put a decimal in.

SimonStDavids · 24 October 2012, 06:31

I have taken the lat and long to be a decimal of a degree, but stand to be corrected.

Quote:

Originally Posted by paulbryson75

Last known position on 22nd October was 51.853N 005.231W

Ie. 51.853 is 51 degrees and 0.853 of a degree. Simply convert back. I get a position near black scar, Solva.

I stand to be corrected though.

EnglishLes · 24 October 2012, 07:49

You can use Latitude and Longitude of a Point to input a Lat/Long and get a Map Location.

This gave me 2km offshore between St David's and Solva.

Dhf · 24 October 2012, 12:31

During my search I found this usfull link for onscreen chart reference, which saves pulling the charts dividers and parra rule out, for quick reference anyway.

Sailing Charts. Passage Planning Charts.

Another thing I would like to know is how often data is updated with sat pos, is the tag still transmitting data, or has the power pack simply died, or become detatched. and does the device float.

jumpinjack · 24 October 2012, 12:49

Latest position i believe - 16hours ago is
51.852N 005.266W
Tag is still transmitting data, it floats.

Dhf · 24 October 2012, 14:07

Well that's very little change in position, greatest to the west. maybe caught in nets or something, the tide flows pretty fast round this erea even with neaps, so if it where totally detatched it would have drifted upto 18 to 24nm with each tidal flow change. whats needed is an exact position report within 1hr of recieving data. with Degrees minutes and seconds.

jumpinjack · 26 October 2012, 13:34

Latest position - this morning - 51.908N 005.726W they suspect it is moving in/out with the tide and seem to think it may well come either very close to shore or even ashore on this evenings tide.

Dhf · 26 October 2012, 15:24

Quote:

Originally Posted by SimonStDavids

I have taken the lat and long to be a decimal of a degree, but stand to be corrected.

Ie. 51.853 is 51 degrees and 0.853 of a degree. Simply convert back. I get a position near black scar, Solva.

I stand to be corrected though.

Thank you Simon, It seems you where correct with your decimal of a degree locatating, I have learned this method myself now.

Quote:

Originally Posted by EnglishLes

You can use Latitude and Longitude of a Point to input a Lat/Long and get a Map Location.

This gave me 2km offshore between St David's and Solva.

Many thanks for that convertion link Les, I've learned alot from that.

Quote:

Originally Posted by paulbryson75

Latest position - this morning - 51.908N 005.726W they suspect it is moving in/out with the tide and seem to think it may well come either very close to shore or even ashore on this evenings tide.

Thank you for the updates Paul, and sorry to see nothings turned up yet, I noticed the latest position seems to be approx 18nm west of Ramsey, but I maybe wrong as i'm new to working with decimal coodinates.

Regards

willk · 03 January 2013, 00:02

Some more results from this project here: BBC News - Donegal shark travels 3,000 miles to coast of Africa

Boatnomad · 05 January 2013, 21:08

Quote:

Originally Posted by willk

Some more results from this project here: BBC News - Donegal shark travels 3,000 miles to coast of Africa

Maybe they feed like the Humpback Whales

https://en.wikipedia.org/wiki/Humpba..._and_predation

9D280 · 16 January 2013, 15:29

It's a good 4 degrees too far south for me to do much about helping, but with regard to Lat / Long, there are plenty of Decimal - Deg-min-sec converters out on t'net.

first 3 randoms from google - no warranty / accuracy implied.

Convert Latitude / Longitude in Degrees/Minutes/Seconds to/from Decimal (FCC) USA Used this before.
Latitude / Longitude Conversion - Directions Magazine
Lat-Long Converter, only goes one way.

Failing that, if you are using a handheld GPS, any I've used have an option in the system / setup menu to swap between all the various formats of position. I have the handheld on the Rib set to decimal degrees & the Plotter on DD.MM.SS. Means if anyone shouts a position during a Mayday I can find it quick without having to delve into the setup menu first to convert the format.