The ICS213 message form used by FEMA and a number of
served agencies is not in a format that is easily handled by amateur
radio message handlers. Also, the ARRL message form used by
amateur radio operators is totally alien the the served agencies and
only serves to confuse them. Therefore there a number of methods
that have been tried to sucessfully merge the two systems.
Please do a Google search for ICS213 ARES to review a few.
The following links provide some of the info that you may need:
These are but a few.
Please note that as mentioned in the QST, Sept. 2015, SATERN
article, there have been many different attempts to adapt the Form213
for SSB usage, with mixed results. ICS 213 is best passed using
Winlink or other digital modes with error correcting protocols.
Have fun with ICS 213 and hopefully some day we will have a SC wide