U.S. Customers: Orders shipped from Canada may be subject to U.S. import duties, taxes, and/or tariffs as assessed by U.S. Customs and your carrier. These charges are not included in our product prices or shipping rates. You are responsible for any duties/tariffs/fees due on delivery or prior to delivery.
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Premium Marine Quality Parts

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Seachoice 39861 Double Braid Nylon Dock Line 1/2" X 20' Navy - 39861 - 50-39861F1

Seachoice, Docking & Fendering
$44.09

Premium double braid dock lines complete with 15" eye splice. Pre-shrunk and heat stabilized. These lines offer higher wet strength and better abrasion resistance than other nylons. Won't mold or mildew. 3 year limited warranty. Individually clamshell packed.

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Seachoice 39841 Double Braid Nylon Dock Line 3/8" X 20' Navy - 50-39841 - 50-39841F1

Seachoice, Docking & Fendering
$26.39

Premium double braid dock lines complete with 15" eye splice. Pre-shrunk and heat stabilized. These lines offer higher wet strength and better abrasion resistance than other nylons. Won't mold or mildew. 3 year limited warranty. Individually clamshell packed.

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Seachoice 39831 Double Braid Nylon Dock Line 3/8" X 15' Navy - 50-39831 - 50-39831F1

Seachoice, Docking & Fendering
$21.39

Premium double braid dock lines complete with 15" eye splice. Pre-shrunk and heat stabilized. These lines offer higher wet strength and better abrasion resistance than other nylons. Won't mold or mildew. 3 year limited warranty. Individually clamshell packed.

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Seachoice 39821 Double Braid Nylon Dock Line 5/8" X 25' Navy - 39821 - 50-39821F1

Seachoice, Docking & Fendering
$71.97

Premium double braid dock lines complete with 15" eye splice. Pre-shrunk and heat stabilized. These lines offer higher wet strength and better abrasion resistance than other nylons. Won't mold or mildew. 3 year limited warranty. Individually clamshell packed.

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Seachoice 30630 Open Based Galvanized Dock Cleat, 12" - 30630 - 50-30630F1

Seachoice, Docking & Fendering
$33.69

Hot dipped. Suitable for work boats, seawalls and dock use.

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Seachoice 30620 Open Based Galvanized Dock Cleat, 10" - 30620 - 50-30620F1

Seachoice, Docking & Fendering
$20.39

Hot dipped. Suitable for work boats, seawalls and dock use.

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Seachoice 30610 Open Based Galvanized Dock Cleat, 8" - 30610 - 50-30610F1

Seachoice, Docking & Fendering
$13.59

Hot dipped. Suitable for work boats, seawalls and dock use.

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Seachoice 30600 Open Based Galvanized Dock Cleat, 6" - 30600 - 50-30600F1

Seachoice, Docking & Fendering
$9.69

Hot dipped. Suitable for work boats, seawalls and dock use.

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Seachoice 3-Strand Twisted Nylon Dock Line, White, 3/8" X 10' - 42501 - 50-42501F1

Seachoice, Docking & Fendering
$12.19

Extremely strong rope with 10" eye splice. Designed to absorb sudden shock loads. Very good resistance to abrasion, rot, oils, gasoline and marine growth. Clamshell packed. 100% NylonAbsorbs sudden shock loadsCan be stored wet, won't rotStays flexible throughout its lifeResistant to abrasion, oil, grease, gasoline, mildew and most chemicals10" Eye splice (one end)

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Seachoice 3-Strand Twisted Nylon Dock Line, White, 3/4" X 50' - 42651 - 50-42651F1

Seachoice, Docking & Fendering
$142.39

Extremely strong rope with 24" eye splice. Designed to absorb sudden shock loads. Very good resistance to abrasion, rot, oils, gasoline and marine growth. Clamshell packed. 100% NylonAbsorbs sudden shock loadsCan be stored wet, won't rotStays flexible throughout its lifeResistant to abrasion, oil, grease, gasoline, mildew and most chemicals24" Eye splice (one end)

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Seachoice 3-Strand Twisted Nylon Dock Line, White, 3/4" X 35' - 42641 - 50-42641F1

Seachoice, Docking & Fendering
$125.79

Extremely strong rope with 24" eye splice. Designed to absorb sudden shock loads. Very good resistance to abrasion, rot, oils, gasoline and marine growth. Clamshell packed. 100% NylonAbsorbs sudden shock loadsCan be stored wet, won't rotStays flexible throughout its lifeResistant to abrasion, oil, grease, gasoline, mildew and most chemicals24" Eye splice (one end)

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Seachoice 3-Strand Twisted Nylon Dock Line, White, 3/4" X 25' - 42631 - 50-42631F1

Seachoice, Docking & Fendering
$93.89

Extremely strong rope with 24" eye splice. Designed to absorb sudden shock loads. Very good resistance to abrasion, rot, oils, gasoline and marine growth. Clamshell packed. 100% NylonAbsorbs sudden shock loadsCan be stored wet, won't rotStays flexible throughout its lifeResistant to abrasion, oil, grease, gasoline, mildew and most chemicals24" Eye splice (one end)

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Sea-Dog Boat Hook Mooring Cover Support Crown, 6-1/2" Dia. - 491110-1 - 354-4911101F1

Sea-Dog Line, Docking & Fendering
$16.44

An injection molded nylon crown that fits the tip of an adjustable boat hook or any universal/Acme thread that is used to support a mooring cover or canvas. The unique design has strap or line attachment details allowing the ability to secure the support crown in the correct location eliminating problems caused by water pooling pressures from rain, sleet or snow. Combine any of Sea-Dog's Boat hooks or boat poles with the support crown 4911101 and mooring cover support crown straps 4911151 (sold separately) for the perfect solution to pooling pressure.

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Sea-Dog Boat Hook Mooring Buoy Snap Spare Keeper Plate Only - 491056-1 - 354-4910561F1

Sea-Dog Line, Docking & Fendering
$12.11

Keeper plate for attaching to a boat hook (boat hooks have predrilled mounting holes). 304 Stamped stainless.

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Sea-Dog 561520 Mooring Snubber, A:21-1/2, B:5/8"-3/4" - 561520 - 354-561520F1

Sea-Dog Line, Docking & Fendering
$108.39

Absorb shock loads and relieve tension on lines and deck fittings. The length of compensating movement can be adjusted by the number of line turns around the snubber, mitigating the effects of wind and waves. Easy to use, requiring no extra hardware. Ideal for use in tidal areas, on exposed moorings, or in towing situations. High quality rubber to resist sunlight, saltwater, and ozone.

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Sea-Dog 561516 Mooring Snubber,A:19-3/4" , B:1/2"-9/16" - 561516 - 354-561516F1

Sea-Dog Line, Docking & Fendering
$60.89

Absorb shock loads and relieve tension on lines and deck fittings. The length of compensating movement can be adjusted by the number of line turns around the snubber, mitigating the effects of wind and waves. Easy to use, requiring no extra hardware. Ideal for use in tidal areas, on exposed moorings, or in towing situations. High quality rubber to resist sunlight, saltwater, and ozone.

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Sea-Dog 561512 Mooring Snubber, A:17-1/8" B:3/8" - 561512 - 354-561512F1

Sea-Dog Line, Docking & Fendering
$38.09

Absorb shock loads and relieve tension on lines and deck fittings. The length of compensating movement can be adjusted by the number of line turns around the snubber, mitigating the effects of wind and waves. Easy to use, requiring no extra hardware. Ideal for use in tidal areas, on exposed moorings, or in towing situations. High quality rubber to resist sunlight, saltwater, and ozone.

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Sea-Dog 5610121 Mooring Line Chafe Kit, 1/2" Line Size - 561012-1 - 354-5610121F1

Sea-Dog Line, Docking & Fendering
$24.39

Mooring line chafe kits include: Waxed twine, heavy duty needle and (2) 10" pieces of leather pre-stamped for sewing. Used to reduce chafe and extend the life of mooring lines. Natural leather - color may vary.

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Sea-Dog 3272001 Fender Mate, 1 Pr. - 327200-1 - 354-3272001F1

Sea-Dog Line, Docking & Fendering
$25.39

Fendermate is the latest in fender brackets constructed of marine grade, reinforced injection molded nylon. Clamps securely on both 7/8" and 1" round tubing and 3/16" and 1/4" life line wire. Unique double locking action locks the clamp on the rail or wire while still allowing full adjustment of the height of the fender. When the proper height is reached, the final locking action clamps the rope quickly and securely.

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301112020Bk-1 - 354-301112020Bk1F1

Sea-Dog Line, Docking & Fendering
$35.99

100% premium twisted three-strand nylon 100% premium twisted three-strand nylonHigh strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301112015Bk-1 - 354-301112015Bk1F1

Sea-Dog Line, Docking & Fendering
$27.59

100% premium twisted three-strand nylon 100% premium twisted three-strand nylonHigh strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301110025Bl-1 - 354-301110025Bl1F1

Sea-Dog Line, Docking & Fendering
$18.89

100% premium twisted three-strand nylon 100% premium twisted three-strand nylonHigh strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301110020Wh-1 - 354-301110020Wh1F1

Sea-Dog Line, Docking & Fendering
$21.29

100% premium twisted three-strand nylon High strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301110020Bk-1 - 354-301110020Bk1F1

Sea-Dog Line, Docking & Fendering
$22.19

100% premium twisted three-strand nylon 100% premium twisted three-strand nylonHigh strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Sea Dog Premium Twisted Three-Strand Nylon Dock Line - 301110015Wh-1 - 354-301110015Wh1F1

Sea-Dog Line, Docking & Fendering
$16.99

100% premium twisted three-strand nylon High strength and superior stretch to handle the shock loads of boat wakes and harbor surgesSuperior abrasion resistance to counteract chafeProfessionally hand-spliced with five tucksYacht whipped at the bitter end and splice pointAll lines are medium lay

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Northern Marine Canada
Our products are shipped from Canada!
Parts Warehouse:
Toronto, Ontario, Canada
Head Office:
Kingston, Ontario

About Us

Northern Marine is a Canadian supplier of premium marine and RV parts and accessories from top industry brands. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.