At 70mb, the MAN and SIG messages will be generated and the coded messages window will pop up again with the audio alert. Transmit the MAN and SIG messages the same way that you sent the FZL, except check the squares next to MAN and SIG. The MAN and SIG messages must be transmitted by 0030z/0630z, regardless of whether or not 70mb has been reached. The messages must be sent out by this time so that NCEP can include them in the new model runs. The MAN and SIG can be retransmitted later upon reaching 70mb. Be sure to check the date and time in the coded messages before transmitting them.