That is a cool bag, Vladimir! Do you think that you could jam a sleeping bag in there, through that small hole and then still have enough room for some clothes and food?
I carry a foward cargo tramp when I cruise. I am part of the group in CA, that Tom House mentioned. The Mystere 6.0 has so much buoyancy and freeboard that a cargo tramp ahead of the cross bar works well.
The way I built mine is basically a triangle of nylong netting wihta 3/4" nylon webbing border. The webbing extends at each of the three corners.
One side of the trianlge runs just ahead of the front cross bar. It is stretced taught by the extensions at each corner. They tie to the pad eyes that are riveted on the cross bar for the barber hauler blocks. There is a piece of webbing at teh center with a buckle that snaps around the mast base. This could just as easily be rope, rather than webbing with a buckle.
The third corner extneds forward and has a loop that goes up and arond the spinnaker pole, near the forestay. That corner's extension has a 1/8" rope attached that runs all the way forward to the end of the spin pole and is drawn tight there.
About 18" ahead of the front cross bar, is a 3/4" carbon tube that lays on top of the decks and is sewn to the tramp. This tubing is the lower part of a graphite surf casting fishing pole. Each end of it has some rubber hose covering it to keep it from scratching the decks.
Where the fishing pole crosses under the spin pole, there is another webbing with buckle that attahces there too.
I carry to watertight bags (wall mart $20 -$30) and I have a rip cord system that allows the bags to be released by yanking on a light line that dangles in the water when sailing, hangs from the center of the cargo tramp to the wetted hull when (no, IF) capsized.
Here is how I did the rip cord deal. In the center of the tramp I sewed in some webbing to reinforce the skimpy netting. Inot this webbing I pressed in, two grommets, one per cargo bag.
I have a webbing strap for each bag that has an adjustable buckle, such as a car seat belt. The strap is fastened two places, both on the outboard side of the cargo bag. The center of the strap passes through a loop of bungie. This bungie loop is folded and pushed down though the grommet.
On the bottom side of the tramp, a piece of batten is passed through the loop of bungie and prevents the bungie from raising up through the grommet, unless this batten or rip cord pin is yanked. Finally, one string (bright pink dynema) is tied to both rip cord pins and the rip cord is long enough to reach the wetted hull when the boat is on her side.
