Need larger Data Frame

HI I need to send more than 4 bytes of data at one time
for instance: TANK #1 this is a 7 chars == 7 bytes;
Or Longitude: E192.7
Or Latitude: N87.5
I know that Latitude is id: 1000 & Longitude is id: 1001 & Altitude is 1003

Some of my strings are much longer 40 chars:(