Z  S P A R S  U K  L o g o

Single Line Reefing Boom Systems

We offer 2 types of 'single line' reefing systems. The feature that they have in common is that (in addition to adjusting the main halyard) it is only necessary to pull one line to take in a reef.

System 1 - Continuous Single Line Reefing System

This system can be implemented on our standard slab reefing booms(all sizes) without modification. However, it requires blocks to be sewn into the sail at the tack and clew of each reef, as illustrated below. 2 such reefs are possible - both taken in on the port side. A standard 3rd slab reef can be installed in addition.

Continuous single line reef system

System 2 - Single Line Reefing System with in-boom tackle

This system can be fitted to our Z204, Z360 and Z480 booms. Tackle for two reefs can be accommodated internally in the section. The second reef height is limited by the amount of travel of the block inside the boom to approximately boom length plus 400mm. A standard 3rd slab reef can be installed in addition.
Note that the position of the mainsail luff cringle for each reef must be positioned further aft than normal. 140mm aft of the mast for Z204 and 220mm aft for Z360 and Z480.

Single Line Reefing Boom drawing
Z204 Boom
Fittings required per reef:
1 SeaSure 0960 double block £11.67
1 HA39 deck bush £0.75
factory fitting charge £30.00
Total 1st reef inc. 18m 8mm braid £55.00
Total 2nd reef inc. 24m 8mm braid £61.00
TOTAL BOOM PRICE (including outhaul ropes) £396.00


Z360 Boom
Fittings required per reef:
1 SeaSure 2960 double block £26.20
1 HA239 deck bush £0.82
factory fitting charge £30.00
Total 1st reef inc. 18m 10mm braid £79.00
Total 2nd reef inc. 26m 10mm braid £89.00
TOTAL BOOM PRICE (including outhaul ropes) £628.00


Z480 Boom
Fittings required per reef:
1 SeaSure 2960 double block £26.20
1 HA339 deck bush £0.74
factory fitting charge £30.00
Total 1st reef inc. 20m 12mm braid £92.00
Total 2nd reef inc. 28m 12mm braid £105.00
TOTAL BOOM PRICE (including outhaul ropes) £817.00

All prices ex VAT ex works. Prices valid at February 2007.
Reef line lengths quoted above are estimates based on Z Spars spars. Please verify your specific requirements before ordering.

Last Updated on 15 November 2007