“Hi Low Reefer”

The John Mast Hi-low Reefer system enables to roll-on-roll-off the mainsail inside the boom in an easy and efficient furling manner. The installation does not present any issue and can be mounted on boats from 20’ to 45’ feet even with fractional arms.
The Hi-low system is composed of the boom, the vang, and a new flexible channel that will be inserted directly into the channel of the mast. The mainsail, which will be designed for this system only, needs to be ordered separately. The steel made feeder enables the mainsail to easily go inside the new flexible channel. A handy adjustment for tensioning the base of the mainsail is installed on the rear boom area. The “Hi-low reefer” boom perfectly fits in a situation such as sailing alone or with an inexperienced team.

The system has many more advantages compared to the common mast furling systems:

1) you will not have to change the mast;
2) the possibility of using a full batten mainsail which gives a better shape to the sail while maintaining a positive luff and therefore more performance;
3) the possibility of removing the mainsail in emergency situations or if the furling does not work properly;
4) the possibility of reducing the mainsail in a traditional way; this system is more practical and easier rather than reducing the mast long profile, especially when there are critical weather conditions;
5) the advantage of not increasing the weight on the shaft and of shifting the center of gravity downwards, reducing heel and pitch;
6) the installation of the John Mast Hi-low Reefer system is much simpler and more straightforward than shaft furling systems, which require shaft replacement;
7) Less cost compared to other systems.

Together with the above-mentioned advantages, there are also other advantages that are typical of all the furling systems, and are:

1) practicality and ease in launching and lowering the sail, especially when sailing alone or with a small crew;
2) better preservation of the mainsail that, inside the boom, is protected from the sun and other atmospherical agents. It leads to a longer life for the mainsail.

The Hi-low reefer system has been made and used successfully by the following shipyards:

B 31, Bavaria 350, Bavaria 960, Biga 262, Boström 37, Catalina 34, Compromis 888, Danboat 29, Dehler 29, Dehler 34, Dehler 39, Dehler Variante, Dufour 31, Elan 33, Elvström Coronet 38, Etap 23, Etap 26 i, Faurby 330, Faurby 424, First 26, Feltz, First 260 Spirit, Friendship 26, Fischer 34, Füke 32, Goldrush, Grabber 24, Granada 31, Granada 858, H 26, H-Båd, H-26, HR 29, HR 31, HR 312, HR 312, HR 36, Hunter 30, IF Folkebåd, Jeanneau Voyage, Jouet 37, Kelt 850, Legan 34 Binnen, LM 27, LM 30, LM 32, MacGregor 26, Mascot 24, Moody 34, Møn 27, Møn 341, Najad 353, Nauticat 38, Nauticat 38 mesan, Nordborg 37, Nordship 32 Cruiser, Nordship 35 DS, Oceanis 281, Parker 27.5, Pegaz 31, Pierrot, Piper 24, Puma 26, Reinke 12m, Rush, Sirius 32 DC, Sirius 36 DS, Skorpion II, Skorpion III, Skorpion IV, Smiling, Sun Beam 29 Perf., Sun Dream 28, Sun Odyssey 33, Sun Odyssey 37, Sun Shine 38, Sunbeam 23, Sunbeam 26, Sunbeam 29, Sunbeam 33, Sunprise, Vindö 65 Ketch Groß Mast, Vindö 65 Ketch Besan Mast, Vindö 32, Westerly 33 sloop, Westerly Storm 33, Wibo 830, X-102 AND MUCH MORE !!! More than 5.000 Hi-low reefer boom have already been shipped and are ready to be installed.