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                                            Anchor Selection & Specification Guide

Boat size recommendations are for boats of average windage and proportions in 30 knots of wind, average bottom conditions, and moderate protection from open seas. Remember that the loads in 42 knots of wind are twice as much as in 30 knots.

Use three-strand nylon rope, 6-12 ft (2-4 m) of chain and a minimum of 5:1 scope. Also, a minimum of 6 ft (2 m) of chain should be used for every 25 ft (8 m) of water depth. For storm conditions use an anchor one or two sizes larger.




 

Exclusively on Fortress...
 
FORTRESS SELECTION GUIDE
Model
FX-7 FX-11 FX-16 FX-23 FX-37 FX-55 FX-85 FX-125
Boat Length
         

 

 

 

 
ft 16'-27' 28'-32' 33'-38' 39'-45' 46'-51' 52'-58' 59'-68' 69'-150'
m 5-8 8-10 10-12 12-14 14-15 16-18 18-21 21-46
Weight
lb 4 7 10 15 21 32 47 69
kg 1.8 3.2 4.5 6.8 9.5 14.4 21.2 31.1
Replaces Steel Anchors
lb 6-9 10-13 14-18 19-28 33-50 50-65 70-90 100-170
kg 3-4 5-6 6-8 9-13 15-23 23-29 32-41 45-77
HOLDING POWER
Model FX-7 FX-11 FX-16 FX-23 FX-37 FX-55 FX-85 FX-125
Working Load                  
lb 700 900 1.250 2,000 3,000 4,000 5,250 6,750
kg 318 408 567 907 1,351 1,814 2,381 3,062
32 Degree Hard Sand Holding Power lb 2,800 3,600 5,000 8,000 12,000 16,000 21,000 27,000
kg 1,270 1,633 2,268 3,629 5,443 7,258 9,536 12,247
45 Degree Soft Mud Holding Power lb 840 1,080 1,500 2,400 3,600 4,800 6,300 8,100
kg 381 490 680 1,089 1,633 2,177 2,858 3,674
32 Degree Soft Mud Holding Power lb 420 540 750 1,200 1,800 2,400 3,150 4,050
kg 191 245 340 544 816 1,089 1,429 1,837
DIMENSIONS
Model FX-7 FX-11 FX-16 FX-23 FX-37 FX-55 FX-85 FX-125
"A" Shank Length [diagram]
                 
in
24" 27" 31" 36" 40" 46" 51" 56"
mm
610 685 787 914 1,016 1,168 1,295 1,422
"B" Fluke Length [diagram]
in
14" 16" 18" 21" 24" 27" 30" 33"
mm
356 406 457 533 610 686 762 838
"C" Stock Length[diagram]
in
19" 22" 25" 29" 32" 37" 41" 45"
mm
483 559 635 737 813 940 1,041 1,143
SUPPORT HARDWARE
Model
FX-7 FX-11 FX-16 FX-23 FX-37 FX-55 FX-85 FX-125
Proof Coil Chain                  
in 3/16" 1/4" 5/16" 3/8" 3/8" 1/2" 1/2" 1/2"
mm 5 6 8 9 9 13 13 13
Nylon Rope in 3/8" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1 1/4"
mm 9 9 13 16 19 22 25 32
Shackle Size in 1/4" 1/4" 5/16" 3/8" 7/16" 1/2" 5/8" 5/8"
mm 6 6 8 10 12 12 16 16

NOTE: Hard sand holding power figures above represent loads actually achieved on production FORTRESS and Guardian anchors under controlled horizontal pull conditions without dragging or resulting in disabling structural deformation.

 

** Rope recommendations are based on 25% of breaking strength. Rope must be in good condition.

 

 

 

 

 

Anchor Rodes Fortress Anchor FX-7 Fortress Anchor FX-11
Fortress Anchor FX-16 Fortress Anchor FX-23 Fortress Anchor FX-37
Fortress Anchor FX-55 Fortress Anchor FX-85 Fortress Anchor FX-125
Anchor Accessories
 
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