00410_AFSC_Trawl_Repair_Net_Description_Net_Diagrams.pdf

Gary Stauffer (Compiler)

U.S. Department of Commerce National Oceanic and Atmospheric Administration National Marine Fisheries Service

NOAA Technical Memorandum NMFS-SPO-65 October 2004

NOAA Protocols for Groundfish Bottom Trawl Surveys of the Nation’s Fishery Resources

March 16, 2003

Eastern Bering Sea Shelf Bottom Trawl Survey Gear Description for 83-112 Eastern Trawl

Netting: Body and wing 4" stretched measure (including length of one knot) 60 T nylon, three-strand twist, preshrunk and dyed green.

Intermediate and codend - 3½" stretched measure 96 T nylon, three-strand, twist, preshrunk and dyed green.

Codend liner - 1¼" stretched measure 18 T nylon, three-strand twist, preshrunk and dyed green.

Headrope: 83' 9" of ½" (6×19) galvanized fiber core wire rope wrapped with d" polypropylene rope.

Both eyes have ½" gusseted thimbles.

The headrope doesn’t include the length of either eye.

Length is measured from the top of the nicro sleeve to the top of nicro at the other end.

Top wings are hung over 36'.

Footrope: 111' 9" plus thimbled eyes of e", (6×19) galvanized, fiber core wire rope, wrapped with ½" polypropylene rope.

Loops of 5/16" galvanized, proof coil chain, (approx. 170') are tied to wrapped footrope by passing two fathoms of double 21 T nylon twine through every tenth link starting at the top of the nicro forming the eye splice.

Chain links are secured to footrope every 8" throughout length of wing forming 76 chain hangings over 50' each wing.

Busom has 16 chain hangings equally spaced over 11' 9".

There are four bars (2 meshes) per hanging in wings and 4 meshes per hanging in busom, hung with 96 T nylon round braid hanging twine.

After the net is hung, split pieces of heavy rubber hose are served around footrope, passing the hose twice between each chain hanging for the length of the footrope.

Breastlines: ½" (6×19) galvanized wire rope wrapped with d" polypropylene rope.

Top and bottom breastlines are 8', measured from the top of the nicro press forming one eye through the bearing point of the other eye.

Riblines: ¾" Samson 2 and 1® Duralon braided trawl rope.

Riblines are hung at 97% of stretched measure of the gored seam.

All measurements are made with 400 lbs of tension on rope.

Gored seams are attached to riblines using white, untreated 60 T braided nylon hanging twine used to tie a benzel every 16".

NOAA Fisheries Trawl Survey Protocols

Flotation: Seventeen 8" aluminum side lug floats along each wing and seven 8" floats in center.

Total of 41 floats along headrope spaced 24¼" apart.

Buoyancy of 6.3 lbs each (258 lbs total).

Side seams: Side seams are laced in top and bottom individually gathering 3 meshes (4 knots) using white, double 21 T perma-grip® (or like kind) nylon three-strand twine.

Top and bottom panels are then laced together using green, double 21 T perma-grip® (or like kind) nylon three-strand twine.

Codend: 3½" stretched measure (including one knot) nylon, dyed green, 96 T nylon three-strand mesh.

Codend is a “double wall” construction.

Four panels of 96 T web cut 64 meshes long by 120 meshes deep.

Two meshes on each side are laced together, leaving 60 “open meshes” per panel.

Gored seams are laced together using 60 T round braid hanging twine and hung to riblines of ¾" Samson 2in1® Duralon braided trawl rope.

Riblines in codend are hung at 90% of stretched measurement of gored seams.

Riblines are measured under 400 lbs of tension.

Codend is closed at aft end using 24-2½" x 5/16" galvanized steel rings.

A ¼" Duralon braided rope is passed through 5 selvage meshes and a ring is attached to the rope using a cow hitch every 12" leaving five open meshes between each ring.

The bag is then closed using a e" - ¾" hauling clip.

A liner of 1¼" three strand twine nylon, 360 meshes long by 200 meshes deep is hung on the inside of the bag 78 meshes up from terminal end.

Alaska Fisheries Science Center

Materials List for 83-112 Eastern Trawl

Specifications of wire, chain, and rope include rated breaking strength (BS), specific gravity (SG), and density.

WEB: Mesh sizes listed are given in “stretched measure”, a standard method of measuring mesh size that includes the length of one knot.

Body and wings ~ 4" # 60T three strand nylon - dyed green.

Intermediate ~ 3½" # 96T three strand nylon, dyed green, single wall construction.

Codend ~ 3½" # 96T three strand nylon, dyed green, double wall construction.

Liner ~ 1¼" # 18T three strand nylon - dyed green.

Chaffing gear ~ 6", 6-mm polyethylene knotted web.

WIRE ROPE: ½" 6×19 galvanized fiber core (BS 9,700 kg, 0.62 kg/m), eyes are formed using galvanized reinforced thimbles.

CHAIN: 5/16" galvanized proof coil (BS 4,750 kg, 1.21 kg/m).

FLOATS: 8" side lug trawl floats, depth rated to a minimum 400 fm, 258 lbs of total buoyancy.

RIBLINES: ¾" Samson Duralon™ 2-in-1® stable braid, white, light bonding (BS 8,800 kg, SG 1.83, 0.27 kg/m).

TWINE: Sewing panels together: # 60T three strand nylon.

Lacing seams: double, white # 21T three strand nylon.

Joining seams together: double, green # 21T three strand nylon.

Hanging on framing lines: white, # 96T round braid hanging twine.

Fly mesh at end of bag- # 182T round braid hanging twine

ROPE: Float lines - 1/4" polypropylene (BS 570 kg, SG 0.95).

Pucker ring lines- Samson 1/4" Duralon™ 2-in-1®(BS 1,270 kg, SG 1.38).

Restrictor rope- 1 1/8" Poly Plus™ three strand (BS 10,740 kg, SG 0.91).

Splitting strap- 3/4" Spectra™ braided rope with eye each end (BS 21,773 kg, SG 0.98).

Splitting ring lines- ½" Samson Duralon™ 2-in-1® stable braid (BS 4,477 kg, SG 1.38).

Hole through trawl float line- ½" hollow braid Poly-Plus™ (BS 2,721 kg, SG 0.91).

FOOTROPE: e" 6×19 galvanized, fiber core wire rope with reinforced thimbled eyes.

½" three strand polypropylene rope served around wire rope.

5/16" galvanized proof coil chain.

Split heavy rubber hose served between chain hangings.

Footrope setback/extension, ½" long link alloy chain connected to footrope with a e" hammer lock. Total length including connecting hardware - 24".

Splitting rings - 5½" × ¾".

Pucker rings at end of codend- 2½" × ¼".

Framing Lines for 83-112 Eastern Trawl

Net Plan for 83-112 Eastern Trawl (“Cut Plan” = Total Mesh Counts)

Net Reel/Bridle Rigging Plan for 83-112 Eastern Trawl

Trawl Door Rigging Plan Detail for 83-112 Eastern Trawl Sole Manufacturer NET Systems, Inc., Bainbridge Island, WA

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Net Repair Form for 83-112 Eastern Trawl - Top Panel

Net Repair Form for 83-112 Eastern Trawl - Bottom Panel

Eastern Bering Sea Slope Survey Gear Description for Poly Nor’Eastern Trawl

Netting: Polyethylene, 5" stretch measure - 4 mm top and sides, 5 mm bottom and intermediate.

Headrope: 89' 1" of ½" (6×19) galvanized wire rope wrapped with d" polypropylene rope.

Both eyes have ½" gusseted thimble; 89' 1" doesn’t include the length of either eye.

Headrope length is measure from the top of the nicro sleeve to the top of the nicro at other end.

Top wing is hung over 16.31" per taper combination.

Headrope setback - 18" of ½" long link galvanized alloy chain and connecting hardware.

Bolsh line: 81' 7" plus thimbled eyes of d" (6×19) galvanized wire rope, wrapped with d" polypropylene rope.

Fishing Line: 81' of ½" long link galvanized alloy chain.

Safe working load of 11,300 lbs.

Breastlines: ½" (6×19) galvanized wire rope wrapped with d" polypropylene rope.

Top corner 19' 6", bottom corner 8' 8", bottom side panel 30' 6".

All lengths are measured from the top of nicro sleeve at wing tip and including thimbled eye at ribline.

Riblines: ¾" Samson 2in1® Duralon braided trawl rope.

Riblines are hung at 98% of stretch measure of gored seam.

All measurements are made with 400 lbs of tension on rope.

Gored seams are attached to the ribline using white untreated 60 T braided nylon hanging twine used to tie a benzel every 16".

Groundgear: 8" rubber discs strung on ½" galvanized, long link marine deck lashing chain, grade 70, 79' 6" bearing to bearing (eye to eye). “Flying wing” outboard sections, 4" rubber discs strung on ¾" (6×19) fiber core wire rope.

See groundgear diagram for more detailed description.

Side Seams: Side seams are laced in each panel individually.

Seams are made by gathering 3 meshes (4 knots) and lacing them together using white, double 21 thread perma-grip® (or like kind) nylon, three-strand twine.

Individual panels are laced together using green, double 21 thread perma-grip® nylon, three-strand twine.

Panels which are secured to framing lines have selvage edge created by gathering 3 meshes as described above.

These selvage edges are hung tight to framing lines using 60 T braided nylon hanging twine.

Flotation: Ninety 8" side lug deep-water trawl floats (5.4 lbs of buoyancy each) hung evenly to headrope starting 1' from wing tip, leaving 3' open in the center of the headrope.

Total buoyancy - 486 lbs.

Splitting Gear: ¾" Spectra® rope spliced 21' with eyes in each end.

The rope is passed through four galvanized rings secured to each ribline 18 meshes from the bottom. A second identical splitting strap is located 38 meshes from the bottom.

Codend: 3½" stretched measure (including 1 knot) polyethelene 4 mm double bar mesh.

Four panels cut 30 meshes long by 100 meshes deep.

Two meshes in a gored seam each side, leaving 26 open meshes per panel.

Gored seams are laced together using double 21 T nylon twine.

Riblines in codend are ¾" 2in1® Duralon braided trawl rope, hung at 90% of the stretch measure of the gored seams.

Codend is closed at terminal end using 25 2½" X ¼" galvanized steel rings.

A ¼" Duralon rope is passed through the selvage mesh and a ring is attached to the rope using a cow hitch every 12", with five open meshes between each ring.

The bag is then closed using a e"-¾" hauling clip.

Eastern Bering Sea Slope Survey Materials List for Poly Nor’Eastern Trawl

Specifications of wire, chain, and rope include rated breaking strength (BS), specific gravity (SG), and density.

WEB: All web in the trawl should be depth stretched and heat set in the manufacturing process. Mesh sizes listed in the plan are given in “stretched measure”, a standard method of measuring mesh size that includes the length of one knot.

Top, body and wings, side panels ~ 5", 4-mm polyethylene knotted web.

Bottom, body and wings, intermediate ~ 5", 5mm polyethylene knotted web. All polyethylene web in net panels is orange.

Liner ~ 1.25", # 18T three strand nylon knotted web - dyed green.

Chaffing gear ~ 6", 6mm double bar mesh, polyethylene knotted web -orange.

Chaffing strip, bottom~ 5", 5mm double bar mesh, polyethylene knotted web - orange.

WIRE ROPE: ½" 6×19 galvanized fiber core (BS 9,700 kg, 0.62 kg/m), eyes are formed using galvanized reinforced thimbles.

CHAIN: ½" (16 mm) galvanized, long link marine deck lashing chain, grade 70 (BS 20,500 kg, 3.42 kg/m).

FLOATS: Ninety 8" side lug deep-water trawl floats (5.4 lbs buoyancy each) depth rated to a minimum of 2,000 m.

RIBLINES: ¾" Samson Duralon™ 2-in-1® stable braid, white, light bonding (BS 8,800 kg, SG 1.83, 0.27 kg/m).

TWINE: Sewing panels together: 5-mm polyethylene twine, any color other than orange.

Lacing seams: # 21T white, three strand nylon.

Joining top and side seams together: # 21T green three strand nylon.

Joining bottom and intermediate seams: 60T white braided hanging twine.

ROPE: Float lines - 1/4" polypropylene (BS 570 kg, SG 0.95).

Pucker ring lines- Samson 1/4" Duralon™ 2-in-1®(BS 1,270 kg, SG 1.38) Restrictor rope- 1 1/8" Poly Plus™ three strand (BS 10,740 kg, SG 0.91).

Splitting strap- 3/4" Spectra™ braided rope with eye each end (BS 21,773 kg, SG 0.98).

Rope to serve cables- 3/8" polypropylene three strand.

Chaffing gear- Poly hula skirt material.

FOOTROPE: ½" galvanized, long link marine deck lashing chain, grade 70, 79' 6".

8" rubber disc with a 2½” center hole.

Steel plate chain washers- 5" x d" - 2½” center hole.

Chain toggles- 5.5 lbs. each, chain droppers are 6½” long, spaced 18" on center along length of footrope. Toggles are attached to fishing line with 5/16" import trawl shackles. Four hole triangle delta plate, d" steel.

Eastern Bering Sea Slope Bottom Trawl Survey Framing Lines for Poly Nor’Eastern Trawl

Net Plan for Poly Nor’Eastern Trawl

(“Cut Plan” = Total Mesh Counts)

Twine Sizes: top and sides 4 mm bottom and intermediate 5 mm

Trawl Door Rigging Plan Detail for Poly Nor’Eastern Trawl as te rn

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Groundgear Construction Plan for Poly Nor’Eastern Trawl rv ey T ra w l C he ck L is t

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Net Repair Form for Poly Nor’Eastern Trawl - Top Panel

Net Repair Form for Poly Nor’Eastern Trawl - Bottom and Side Panels

Gulf of Alaska and Aleutian Islands Bottom Trawl Surveys Gear Description for Poly Nor’Eastern Trawl

Netting: Polyethylene, 5" stretch measure - 4 mm top and sides, 5 mm bottom and intermediate.

Headrope: 89' 1" of ½" (6×19) galvanized wire rope wrapped with d" polypropylene rope.

Both eyes have ½" gusseted thimble; 89' 1" doesn’t include the length of either eye.

Headrope length is measure from the top of the nicro sleeve to the top of the nicro at other end.

Top wing is hung over 16.31" per taper combination.

Headrope setback - 18" of ½" long link galvanized alloy chain and connecting hardware.

Bolsh line: 81' 7" plus thimbled eyes of d" (6×19) galvanized wire rope, wrapped with d" polypropylene rope.

Fishing Line: 81' of ½" long link galvanized alloy chain.

Safe working load of 11,300 lbs.

Breastlines: ½" (6×19) galvanized wire rope wrapped with d" polypropylene rope.

Top corner 19' 6", bottom corner 8' 8", bottom side panel 30' 6".

All lengths are measured from the top of nicro sleeve at wing tip and including thimbled eye at ribline.

Riblines: ¾" Samson 2in1® Duralon braided trawl rope.

Riblines are hung at 98% of stretch measure of gored seam.

All measurements are made with 400 lbs of tension on rope.

Gored seams are attached to the ribline using white untreated 60 T braided nylon hanging twine used to tie a benzel every 16".

Roller Gear: 79' 6" bearing to bearing (eye to eye). ¾" (6×19) galvanized wire rope with 14" bobbins (Footrope) and 4" discs.

See attached diagram for more detailed description.

Side Seams: Side seams are laced in each panel individually.

Seams are made by gathering 3 meshes (4 knots) and lacing them together using white, double 21 thread perma-grip® (or like kind) nylon, three-strand twine.

Individual panels are laced together using green, double 21 thread perma-grip® nylon, three-strand twine.

Panels which are secured to framing lines have selvage edge created by gathering 3 meshes as described above.

These selvage edges are hung tight to framing lines using 60 T braided nylon hanging twine.

Flotation: Twenty 12" Cycolac® side lug trawl floats (23 lbs of buoyancy each) hung evenly to headrope starting 1' from wing tip, and four 8" side lug trawl floats (5.4 lbs buoyancy each) hung two each on both sides of center, leaving 3' open in the center of the headrope.

Total buoyancy - 486 lbs.

Splitting Gear: ¾" Spectra® rope spliced 21' with eyes in each end.

The rope is passed through four galvanized rings secured to each ribline 18 meshes from the bottom. A second identical splitting strap is located 38 meshes from the bottom.

Codend: 3½" stretched measure (including 1 knot) polyethelene 4 mm Double Bar mesh.

Four panels cut 30 meshes long by 100 meshes deep.

Two meshes in a gored seam each side, leaving 26 open meshes per panel.

Gored seams are laced together using double 21 T nylon twine.

Riblines in codend are ¾" 2in1® Duralon braided trawl rope, hung at 90% of the stretch measure of the gored seams.

Codend is closed at terminal end using 25 2½" X ¼" galvanized steel rings.

A ¼" Duralon rope is passed through the selvage mesh and a ring is attached to the rope using a cow hitch every 12", with five open meshes between each ring.

The bag is then closed using a e"-¾" hauling clip.

Materials List for Poly Nor’Eastern Trawl

Specifications of wire, chain, and rope include rated breaking strength (BS), specific gravity (SG), and density.

WEB: All web in the trawl should be depth stretched and heat set in the manufacturing process. Mesh sizes listed in the plan are given in “stretched measure”, a standard method of measuring mesh size that includes the length of one knot.

Top, body and wings, side panels ~ 5", 4-mm polyethylene knotted web -orange.

Bottom, body and wings, intermediate ~ 5", 5mm polyethylene knotted web - orange.

Liner ~ 1¼", # 18T three strand nylon knotted web - dyed green.

Chaffing gear ~ 6", 6mm double bar mesh, polyethylene knotted web -orange.

Chaffing strip, bottom~ 5", 5mm double bar mesh, polyethylene knotted web - orange.

WIRE ROPE: ½" 6×19 galvanized fiber core (BS 9,700 kg, 0.62 kg/m), eyes are formed using galvanized reinforced thimbles.

CHAIN: ½" (16 mm) galvanized, long link marine deck lashing chain, grade 70 (BS 20,500 kg, 3.42 kg/m).

e" (16 mm) galvanized, long link marine deck lashing chain, grade 70 (BS 28,670 kg, 5.06 kg/m).

FLOATS: Twenty 12" side lug trawl floats (23 lbs. buoyancy each) depth rated to a minimum of 450 fm. Four 8" side lug trawl floats (5.4 lbs buoyancy each).

RIBLINES: ¾" Samson Duralon™ 2-in-1® stable braid, white, light bonding (BS 8,800 kg, SG 1.83, 0.27 kg/m).

TWINE: Sewing panels together: 5-mm polyethylene twine, any color other than orange.

Lacing seams: # 21T white, three strand nylon.

Joining top and side seams together: # 21T green three strand nylon.

Joining bottom and intermediate seams: 60T white braided hanging twine.

ROPE: Float lines - 1/4" polypropylene (BS 570 kg, SG 0.95).

Pucker ring lines- Samson 1/4" Duralon™ 2-in-1®(BS 1,270 kg, SG 1.38) Restrictor rope- 1 1/8" Poly Plus™ three strand (BS 10,740 kg, SG 0.91).

Splitting strap- 3/4" Spectra™ braided rope with eye each end (BS 21,773 kg, SG 0.98).

Rope to serve cables- 3/8" polypropylene three strand.

Chaffing gear- Poly hula skirt material.

FOOTROPE: (GOA, Aleutian Islands, MACE) ¾" 6×19 galvanized, fiber core wire rope 79' 6", (BS 21,600 kg, 1.41 kg/m) .

4" rubber disc with a 1" hole- wing extensions, center section between bobbins 8" rubber disc with a 2¼" hole - wing extensions.

e" Long link marine deck lashing chain, grade 70.

Laminated rubber “cone style” wing bobbins with a 2½" steel reinforced hole.

Chain droppers 10" in length. Five links of d" chain and one ring 2½"×¼" ¾" barrel clamps Steel plate wire rope washers- 5" ×d"- 1" center hole.

1¼" ID - 1¾" OD heavy hose over bare ¾" wire.

Four hole triangle delta plate, d" steel.

Framing Lines for Poly Nor’Eastern Trawl

Net Plan for Poly Nor’Eastern Trawl

(“Cut Plan” = Total Mesh Counts)

Twine Sizes: top and sides 4 mm bottom and intermediate 5 mm

Trawl Door Rigging Plan Detail for Poly Nor’Eastern Trawl

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Bobbin Roller Gear Construction Plan for Poly Nor’Eastern Trawl rv ey T ra w l C he ck L is t

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Net Repair Form for Poly Nor’Eastern Trawl - Bottom and Side Panels

Net Repair Form for Poly Nor’Eastern Trawl - Top Panel