FORTRESS SELECTION GUIDE

BOAT LENGTH ft 16'-27' 28'-32' 33'-38' 39'-45' 46'-51' 52'-58' 59'-68' 69'-150'
  m 5-8m 8-10m 10-12m 12-14m 14-15m 16-18m 18-21m 21-46m
FORTRESS MODEL   FX-7 FX-11 FX-16 FX-23 FX37 FX-55 FX-85 FX-125
   Weight lb (kg) 4 (1.8) 7 (3.2) 10 (4.5) 15 (6.8) 21 (9.5) 32 (14.4) 47 (21.2) 69 (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
Working Load lb 700 900 1,250 2,000 3,000 4,000 5,250 6,750
  kg 318 408 567 907 1,361 1,814 2,381 3,062
32° Hard Sanding Holding 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 9,526 12,247
45° Soft Mud Holding 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° Soft Mud Holding 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
"A" Shank Length in (mm) 24" (610) 27" (686) 31" (787) 36" (914) 40" (1,016) 46" (1,168) 51" (1,295) 56" (1,422)
"B" Fluke Length in (mm) 14" (356) 16" (406) 18" (457) 21" (533) 24" (610) 27" (686) 30" (762) 33" (838)
"C" Stock Length in (mm) 19" (483) 22" (559) 25" (635) 29" (737) 32" (813) 37" (940) 41" (1,041) 45" (1,143)
  SUPPORT HARDWARE
Proof Coil Chain in (mm) 3/16" (5) 1/4" (6) 5/16" (8) 3/8" (9) 3/8" (9) 1/2" (13) 1/2" (13) 1/2" (16)
Nylon Rope ** in (mm) 3/8" (9) 3/8" (9) 1/2" (13) 5/8" (16) 3/4" (19) 7/8" (22) 1" (25) 1 1/4" (32)
Shackle Size in (mm) 1/4" (6) 1/4" (6) 5/16" (8) 3/8" (10) 7/16" (12) 1/2" (12) 5/8" (16) 5/8" (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 manufacturer’s ratings of 25% of breaking strength. Rope must be in good condition.