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View Full Version : Collosion Avoidance - A Script to Assist RC in Identifying Relative Pos'n of Rowers



brianb
06-24-2014, 07:54 AM
EVeryone is aware that a fleet of boats are rowing to Hawaii. They left Monterey about 7 days ago. They are using the YB tracking system. I have access to their position data hourly. I would like to see if a volunteer could create a script, in Python or something similar, that could compare all the row boat positions with all the SHTP boat positions and then flag any close approaches. The row boats are all equipped with AIS on low antennas.

The script would have to do an NxM analysis.
Compare two sets of spherical coordinates (lat/lon) and create a distance vector.
Generate a report of nearest approaches in order of separation distance, and/or flag near approaches (50 NM ? ). Email report to the RC.
The script would have to open two URL's and scrub/parse the URL's for relevant data.

Any takers out there ?

Google Great Pacific Race for data on the rowing teams.

Thanks
Brian

pogen
06-24-2014, 08:44 AM
They are going to Oahu and are all WAY south of the rhumbline. So the hazard seems pretty low.

I've got 85% of this done already --

data from here:

http://yb.tl/Links/greatpacificrace2014

Import Expedition files and parse to get

PROJ 36.602 -121.89 201406241400
ROWI 35.0136 -121.707 201406241500
ELSA 32.8468 -121.49 201406241400
JIMB 34.9357 -121.2 201406241500
CLEA 36.6041 -121.892 201406111600
CC4P 30.0638 -123.685 201406241400
FATC 32.7535 -122.512 201406241400
BATT 28.3586 -129.111 201406241400
BOAT 33.302 -123.36 201406241400
PACI 33.578 -121.526 201406241400
NOMA 30.0787 -126.484 201406241400
PACI 31.0135 -125.745 201406241400
UNIT 28.2012 -130.676 201406241400
SUPP 36.6038 -121.89 201406241400
SUPP 36.6012 -121.905 201406241400

http://www.sfbaysss.org/forum/attachment.php?attachmentid=632&d=1403624506


632


Their VMGs are really low -- our fleet should pass way to the north of them .

brianb
06-24-2014, 09:32 AM
Agreed, and thanks.

Just a precaution (" just because you are paranoid doesn't mean they arn't out to get you" [Grove]). The WestSail or Mini might go off on a hot vector seeking big breeze and apparent angle and get pretty far south, you never know.

Thanks and that was quick. I just don't have time to dabble with it.


They are going to Oahu and are all WAY south of the rhumbline. So the hazard seems pretty low.

I've got 85% of this done already --

data from here:

http://yb.tl/Links/greatpacificrace2014

Import Expedition files and parse to get

PROJ 36.602 -121.89 201406241400
ROWI 35.0136 -121.707 201406241500
ELSA 32.8468 -121.49 201406241400
JIMB 34.9357 -121.2 201406241500
CLEA 36.6041 -121.892 201406111600
CC4P 30.0638 -123.685 201406241400
FATC 32.7535 -122.512 201406241400
BATT 28.3586 -129.111 201406241400
BOAT 33.302 -123.36 201406241400
PACI 33.578 -121.526 201406241400
NOMA 30.0787 -126.484 201406241400
PACI 31.0135 -125.745 201406241400
UNIT 28.2012 -130.676 201406241400
SUPP 36.6038 -121.89 201406241400
SUPP 36.6012 -121.905 201406241400

http://www.sfbaysss.org/forum/attachment.php?attachmentid=632&d=1403624506


632


Their VMGs are really low -- our fleet should pass way to the north of them .

pogen
06-24-2014, 09:36 AM
Well the row boats also have AIS-xmit, unlike most of the floating debris, packing crates, big wads of netting and Japanese floating dock modules. I guess there won't be much overlap of our fleet with PacCup.

brianb
06-24-2014, 09:46 AM
Yes, and a good portion of our fleet has AIS as well. That said, the row boat antenna's are nt too high. I doubt range is much more that 8 miles. It would be good to warn folks if things look dicey. As far as the Tsunami debris, I can say that from 2012 a lot of that stuff glows in the dark.

Steevee
06-24-2014, 09:47 AM
I couldn't help but laugh at this thread, not that this isn't an appropriate concern, but that it's probably low on the list of concerns for most racers.
I think most racers are thinking about leaving the bay on a flood tide into 30kts plus northerlies. I would.
Collision at sea with a kayak...I feel sorry for the kayak.
What crazy person rows across an ocean? That's like sailing alone. ; )

pogen
06-24-2014, 09:57 AM
Yes, and a good portion of our fleet has AIS as well. That said, the row boat antenna's are nt too high. I doubt range is much more that 8 miles. It would be good to warn folks if things look dicey. As far as the Tsunami debris, I can say that from 2012 a lot of that stuff glows in the dark.

You know, large pieces of floating debris tend to attract fish. So it's not all bad news.

Philpott
06-24-2014, 11:38 AM
I couldn't help but laugh at this thread, not that this isn't an appropriate concern, but that it's probably low on the list of concerns for most racers.
I think most racers are thinking about leaving the bay on a flood tide into 30kts plus northerlies. I would.
Collision at sea with a kayak...I feel sorry for the kayak.
What crazy person rows across an ocean? That's like sailing alone. ; )
and I couldn't help laughing at these ruminations, oh wise one.

BobJ
06-24-2014, 12:30 PM
Just something else to think about as you're drifting off into NannyNooNoo land. Always sleep feet forward.

Steevee
06-24-2014, 02:23 PM
and I couldn't help laughing at these ruminations, oh wise one.

No wise one here, just a fool. As far as ruminations, they're my specialty. I'm still working on the solutions. But in the above situation you guys know better than I. The only thing I have to offer is good luck, have fun and be brave.

brianb
06-24-2014, 10:04 PM
No wise one here, just a fool. As far as ruminations, they're my specialty. I'm still working on the solutions. But in the above situation you guys know better than I. The only thing I have to offer is good luck, have fun and be brave.

Glad we can provide entertainment. Glad also we can do something relatively easy by using data at our fingertips. NannyNooNoo ?? Is that a Pac Cup term that has developed ?

BobJ
06-24-2014, 10:18 PM
NannyNooNoo?? Is that a Pac Cup term that has developed?

Yeah. I'm told that at the end of your watch you tell the helmsman "I'm going NannyNooNoos now. Wake me up if you need something."

Totally a PacCup thing - in the solo race the voices don't give a crap whether you sleep.

brianb
06-24-2014, 10:30 PM
Totally a PacCup thing - in the solo race the voices don't give a crap whether you sleep.

The Voices ? LOL

pogen
06-25-2014, 08:28 AM
The Voices ? LOL

You mean you can't hear them?

kapiib
06-25-2014, 11:30 AM
I sent a message to Beetle - maybe he can do it, he is RETIRED after all...

pogen
06-26-2014, 08:32 AM
http://sfbaysss.org/forum/attachment.php?attachmentid=635&d=1403796631

Rowers this morning

pogen
06-29-2014, 01:51 PM
SECURITY THREAT LEVEL ORANGE

So far so good

http://sfbaysss.net/shtp/wp-content/uploads/2014/06/rowthreat-sunday3.jpg

brianb
06-29-2014, 04:53 PM
Level Orange ??? Cool display.

pogen
06-29-2014, 05:53 PM
The threat level is ORANGE. It is always ORANGE.

Hey I hope Mouton Noir is OK. He is going backwards fast.