These are thrown at the targets and must be a streamer of specific weight balloon nylon. It has to be 170cm long, 10cm wide and be weighted with 70g of sand. They are usually brightly coloured to assist with location once thrown from the balloon. Found on http://www.encyclo.co.uk/local/20160
Markers are indicators on a spectrum analyzing device used to denote measured signal amplitude. They are used to demonstrate certain areas on the test sweep, including channel limits and bandwidth. Using an original point of reference (set to an absolute frequency), markers indicate changes in frequency and amplitude in a given signal Found on http://www.used-line.com/glossaries/glossary.cfm?g_id=11