Let's clear it up about the Emergency Action Messages on Military HF radio.
161 chars.
Is it rare?
In March 2018 anon downloaded a lot of EAM transmissions for analysis.
In the set I downloaded, 148 chars is not that uncommon.
There is was a 235-char message on Mar 19, 2018.
19MAR2018 1730 ALLSTATIONS "[235 CHAR]
YDTO7L - RLBGYH2H43E74ZCFRIARCXO4
6YUTRPEXMEEDNPIROLROALJDMIEZTK
HVKKE6QNHCJSJNZUJKOMPEQGNQQDDH
VAQIT7V5CRBSQMRLJ7LLUEZBS2P4IY
EOJUWLS6GMNP3JMZYCGTW6V6JS6WSP
BOCC2UEA5RNPW3X7XGDXWDBFK44QXR
DXCWNVUFOFINUBN3FOCCREUPIOPQAZ
TIT4EZWEPKCXXCED4KPJCINGZ
[Broadcasted 3 Times]"
19MAR2018 1725 ALLSTATIONS BMO4YT - IIE3T3CTHR5YTEUVFLAX4VDW
19MAR2018 1717 ALLSTATIONS "FOR: SMOOT
Z76QIN - UG57IOSQEOBQOEV2CYU6AB7U"
19MAR2018 1700 ALLSTATIONS "[235 CHAR]
YDTO7L - RLBGYH2H43E74ZCFRIARCXO4
6YUTRPEXMEEDNPIROLROALJDMIEZTK
HVKKE6QNHCJSJNZUJKOMPEQGNQQDDH
VAQIT7V5CRBSQMRLJ7LLUEZBS2P4IY
EOJUWLS6GMNP3JMZYCGTW6V6JS6WSP
BOCC2UEA5RNPW3X7XGDXWDBFK44QXR
DXCWNVUFOFINUBN3FOCCREUPIOPQAZ
TIT4EZWEPKCXXCED4KPJCINGZ
[Broadcasted 2 Times]"
19MAR2018 1633 ALLSTATIONS "[235 CHAR]
YDTO7L - RLBGYH2H43E74ZCFRIARCXO4
6YUTRPEXMEEDNPIROLROALJDMIEZTK
HVKKE6QNHCJSJNZUJKOMPEQGNQQDDH
VAQIT7V5CRBSQMRLJ7LLUEZBS2P4IY
EOJUWLS6GMNP3JMZYCGTW6V6JS6WSP
BOCC2UEA5RNPW3X7XGDXWDBFK44QXR
DXCWNVUFOFINUBN3FOCCREUPIOPQAZ
TIT4EZWEPKCXXCED4KPJCINGZ"
Much shorter messages are more typical. (pic2)
18MAR2018 1817 ALLSTATIONS "FOR: SHAG CARPET
Z7GKJ3 - TXE5IEOZA62XZPKHAJA67M6B"
18MAR2018 1817 DISREGARDED ALL STATIONS
18MAR2018 1807 ALLSTATIONS "FOR: SHAG CARPET
Z7BXAQ - ZUWDZ2IOWP32QEDYDDQ7BSAY"
18MAR2018 1459 ALLSTATIONS BMTVUA - CVYCQVGEUBDSIOMJOAV7DFZV
18MAR2018 1450 ALLSTATIONS BM6PLX - YYPCHEBHOWKEDJJCLJK24H6N
18MAR2018 1442 ALLSTATIONS BMEG7I - XHKDCA5OOUXYSSSMTNG4BA4F
18MAR2018 1432 ALLSTATIONS BMOQKP - RXVQ6EV36AP3HHU6UWQOY35S
18MAR2018 1424 ALLSTATIONS BMEO53 - ITET75PLHPAONSCWZBYYJBML
18MAR2018 1413 ALLSTATIONS BMCNUA - 7FNJ5BG4VIF64TY6GXZ57PAH
18MAR2018 1409 ALLSTATIONS BMHFMU - 5XNBUW5WTHPTSOW6RIN7DADG
18MAR2018 1356 RADIOCHECK TEST COUNT
18MAR2018 1335 RADIOCHECK TEST COUNT
18MAR2018 0713 ALLSTATIONS BMFTAB - KGYUZAZU73GPMR4FUZ3DRQEE
18MAR2018 0659 ALLSTATIONS BM24RG - 4SUCD2PXTLGGL3HMH454QP42
18MAR2018 0308 SKYKING KISS TIME 08 AUTH OH
17MAR2018 2343 ALLSTATIONS BMNLN4 - FCHSM7BCXHNYKYC6OKSXMBZY
17MAR2018 2338 ALLSTATIONS BMM37H - 66CEZ5D75RH7WHQLXEDAKQZA
17MAR2018 2242 ALLSTATIONS "FOR: SHAG CARPET
Z77KNN - QYN3YVHBIVZSAWTSDNCQB3DB"
17MAR2018 2222 ALLSTATIONS "FOR: SHAG CARPET
Z7USS7 - CQQ72NP46MT4CKKVCSYKRBMQ"
17MAR2018 2156 RADIOCHECK OPERATOR GOOFING OFF (WEST COAST TEST COUNT)
17MAR2018 2146 RADIOCHECK TEST COUNT
17MAR2018 2144 RADIOCHECK TEST COUNT
17MAR2018 2114 OTHER ENTERING THE NET AUTHENTICATING FUC WITH K
17MAR2018 2058 OTHER LEG BOOT EXITING THE NET AT 2100
17MAR2018 2043 OTHER "LEG BOOT ENTERING THE NET AUTHENTICATING CUN WITH
T"
17MAR2018 2021 RADIOCHECK "TWO STATIONS TRIED TO CALL, MUSKETEER WAS NOT READ
ABLE"
17MAR2018 1945 OTHER FAILED PHONE PATCH
17MAR2018 1807 RADIOCHECK TEST COUNT
17MAR2018 1803 ALLSTATIONS "FOR: SHAG CARPET
Z7X7AU - 35KLVPXKFTILRB4ZUWAT7TJF"
17MAR2018 1753 ALLSTATIONS BML7HU - KEVBFBHXQT7CS7EEF3NULMP7
17MAR2018 1733 ALLSTATIONS "FOR: SHAG CARPET
Z74JV3 - VFNCTRZU5TXGDACMCL4ISGLR"
17MAR2018 1553 ALLSTATIONS "FOR: SHAG CARPET
Z7ORGO - CKMJYC3WYOKIHA3WSAPYM3XN"
17MAR2018 1337 ALLSTATIONS "FOR: SHAG CARPET
Z75OXL - 4W6MAV44MPBL73MRZNMF72NY"
17MAR2018 1317 ALLSTATIONS "FOR: SHAG CARPET
Z77TL7 - VBNJFADYVM67MTUIWKTUH5W5"
17MAR2018 0710 OTHER STANDING BY FOR TRAFFIC
17MAR2018 0708 ALLSTATIONS "BMMCMS - J57RV3YBWWUFMW7VMQQSJIT4
[Broadcasted 2 Times]"
17MAR2018 0705 ALLSTATIONS "BMJEQW - HVPCY2P74TIZCCWRCVOVPNCE
[Broadcasted 2 Times]"
17MAR2018 0702 ALLSTATIONS "BMCDA3 - L7TLHYTODTIC5EPWH6ZLIRMW
[Broadcasted 2 Times]"
17MAR2018 0635 ALLSTATIONS BMCDA3 - L7TLHYTODTIC5EPWH6ZLIRMW
17MAR2018 0632 ALLSTATIONS BMJEQW - HVPCY2P74TIZCCWRCVOVPNCE
17MAR2018 0613 ALLSTATIONS BMMCMS - J57RV3YBWWUFMW7VMQQSJIT4
17MAR2018 0608 ALLSTATIONS BMD2UT - IARWASNPSZ3R6DLVPJXN5G3S
17MAR2018 0555 ALLSTATIONS BMP6ZS - N7VABLT6R434DULRE5GZHQZU
17MAR2018 0551 ALLSTATIONS BMUT7T - UTVJTHF4HOCVTKY2WHT7TYBK
17MAR2018 0356 SKYKING RUSH TIME 56 AUTH JR
17MAR2018 0340 ALLSTATIONS "BMGYXQ - E7Q4OO7WNFH4FS5PB34QM2D3
[Broadcasted 4 Times]"
17MAR2018 0310 ALLSTATIONS "BMGYXQ - E7Q4OO7WNFH4FS5PB34QM2D3
[Broadcasted 3 Times]"
My dataset is not that large - 435 samples.
I was trying to determine how often the message are sent and if there is any way to characterize them as typical or unusual.