Mobri unique compact design offers the following advantages: low windage, noiseless, light weight, no chafe to sails and rigging, and easy to mount. The most popular model. Choose the S-2 if you sail along the coast. Radar cross section: 2sqm/21.5 sq.ft. Observable distance: Approx 3 nautic miles. Dimensions: 50 x 570mm/ 2 x 22.5". Weight: 380g/ 13.4oz.