AIS talkers for NMEA VDM/VDO messages
I got an email with this question: In my data feed m getting some sentences with packet types I do not recognize. Could you tell me what they mean? !BSVDM !ABVDM I'm also getting multi-sentences with...
View ArticleDisabling autologin on a mac from the command line
Just did this remotely on a mac. I had historically left autologin running. This was blocking some system admin tasks. Here is what I did to fix it....
View ArticleMore open sensor format discussion
Originally posted here: https://github.com/tkurki/navgauge/issues/4 Kees Verruijt pinged me discussion and suggested I should add my $0.02 on requirements. Interesting discussion. For me, JSON is nice...
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Confusion over SRT and ExactEarth's press release
I posted this yesterday on google plus. TL;DR Probably one of: it's NOT AIS (using some other freq/comm encoding), it's an out of spec Class B AIS, or a spamming binary message with EEC to compensate...
View ArticleIOOC DMACS
Today is the start of a multi-day Interagency Ocean Observation Committee - Data Management and Communications Steering Team (IOOC DMAC) meeting. Sadly, I've always been a remote attendee as the rep...
View ArticleUS fishing and passenger exemption for greater than 65 feet
I didn't realize that this exemption is in the USCG AIS Carriage Requirements (emphasis added): - 164.46 Automatic Identification System (AIS). (a) The following vessels must have a properly installed,...
View ArticleLooking at large diffs
Here is a little Unix command line trick. I've been looking at the differences between version releases in software like GDAL, HDF4, HDF5, etc. There is often a lot of noise (aka non-functional...
View ArticleArgo Floats
Earlier this year, Michelle made a super cool vidoe about Argos Floats. The floats are popular and there are other videos out there.
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