Alexandrov's end knot for boats: device, purpose and correct installation

Introduction: Why do you need the Alexandrov terminal on a boat

If you own an inflatable PVC boat or are just planning to buy it, sooner or later you will come across the term. "The End of Alexandrov"**This element often raises questions for beginners about what it is, what it is for, and how to install it correctly. end-of-Alexander) is a critical detail on which the safety and durability of your boat depends.

Constructively, it's special. rope-knotIt's a sling that attaches to the trunk of the boat and fixes the attachments -- the motor, the sonar, the hanging accessories -- without it, the load on the transom is unevenly distributed, which can lead to a loss of power. rupture of PVC material or deformation of the transomThis is especially true for boats with outboard motors with a capacity of 5 hp and above.

In this article, we will examine:

• 🔹 What is the end of Alexandrov and how it's made.
• 🔹 Which boats are it required for?Where can we do without it?
• 🔹 Step by step installation photo-and-video
• 🔹 Typical errors and how to avoid them
• 🔹 Selection of materials: cable, rope, fasteners

What is the end of Alexandrov: the device and the principle of operation

The end knot of Alexandrov is load-sharing The bottom of the boat, named after a Soviet engineer who proposed it in the middle of the twentieth century, is based on a simple physical principle: The load from the motor or equipment should not be transmitted to one point of the transom, but evenly over its entire width..

Structurally, the node consists of:

• 🔸 Main cable (diameter 6-12 mm, depending on the engine power)
• 🔸 Loops or slingstransom
• 🔸 Fortifications (carabiners, talreps, clamps)
• 🔸 Amortizing inserts (optional, to quench vibrations)

When the motor is running, its weight and vibration are transmitted to the transom, and without the end node, this results in:

• 🚨 Local wear of PVC anchorage
• 🚨 transom deformations (especially for boats with wooden or composite transverses)
• 🚨 Risk of engine tear squirm

With proper installation, the end of Alexandrov load-spread And this is especially important for boats with an inflatable keel or a weak transom.

Which boats are required to end Alexandrov

Not all boats require a terminal. mandatory:

Type of boat	Engine power	Does the end of Alexandrov need to be	Notes
PVC boats with inflatable transcenza	From 2.5 hp.	✅ Yes.	Transcript is soft, the risk of deformation
PVC boats with hard transcens (plywood, aluminum)	From 5 hp.	✅ Yes.	With long-term operation
Aluminum boats	Up to 10 hp.	❌ No.	Tran can withstand the load
Boats with a rigid hull (plastic, fiberglass)	Anything.	❌ No.	The exception is weak trans
Fishing boats with sonar/battery	—	✅ Yes.	For distribution of weight of equipment

⚠️ Attention: If your boat is equipped with a power engine over 15 hpThe end of Alexandrov should be double (with two cables) or reinforced metal slings, which is a requirement of many manufacturers, for example, "Flagship." or "Bark.".

For boats with engines up to 2.5 hp (for example, Honda BF2.3 or Mercury 2.5) the end assembly is optional, but is recommended for heavy use, and will prolong the life of the transnose and prevent fatigue.

Step by step: how to set the end of Alexandrov

You don't need any special skills to install the end node, but it's important to follow the algorithm.

• 🛠️ A cable with a diameter of 8-12 mm (for example, polypropylene or nylon)
• 🛠️ 2-4 carbine (load of at least 200 kg)
• 🛠️ Thalrep or tension control clamps
• 🛠️ Knife, lighter (for melting the ends of the rope)
• 🛠️ Line or roulette

Step 1. Measure the transom.

The width of the loop should be on 10-15 cm more than the width of the transomFor example, if the transom is 60 cm, the rope for the loop is 70-75 cm.

Step 2. Form a loop.

Fold the cable in half and make a loop with the help eight-node or play-houseMelt the ends so they don't open.

How to knit a gazebo knot:
1. Fold the cable in half.
2. pass the loop under the main cable.
3. Stretching the ends into the loop and tightening.

Step 3. Secure the loop on the transom

Stick the loop under the transomb so it covers it on both sides, and fasten it with carbines to D-rings or special lovers on the boat.

Step 4. Set the tension.

Use the talreps to adjust the tension. dense but not deformed transmutationYou can check this: press the trench with your hand - if it bends more than 1-2 cm, the tension is weak.

The loop covers the transom symmetrically | carabiners are snapped and locked | The cable is not twisted and has no no nodes |The tension allows the transom to spring slightly->

⚠️ Attention: If your boat has keel (e.g. models) "Profit"** or "Corvette"), the end node loop shall pass keeledIt's not on top of it, otherwise the keel can deform when it's loaded.

Selection of materials: which cable and fastening is better

The quality of the materials depends on the reliability of the node.

1.

• 🔹 Polypropylene It's light, it doesn't sink, but it's afraid of UV rays, it's suitable for temporary use.
• 🔹 Nylon It's durable, it's elastic, it's abrasive, it's optimal for continuous use.
• 🔹 Polyester. It's the most durable, stretchable, chemically resistant, perfect for seawater.
• 🔹 Steel cable in the strap - for motors over 20 hp or commercial use.

Carbines and clamps

Minimum load on the carbine 200 kgBest brands: Petzl, Black Diamond, KongAvoid cheap Chinese counterparts, they can burst under load.

3. Talrep

Use talreps with stainless Plastic talreps are only suitable for boats with engines up to 5 hp.

What happens if you use a weak cable?

If the load is exceeded, the cable can break, which will lead to:

- Falling of the engine overboard (risk of loss or damage)

- Sharp shift of the boat's centre of gravity (risk of tipping over)

- Breaking the transone in the places of attachment (repair will cost 30-50% of the cost of the boat)

💡 Helpful advice: Before you buy a cable, check it for tears, you can use a dynamometer or give a sample to the lab, for example, a cable with a diameter of 10 mm must withstand at least one of the most difficult conditions. 800–1000 kg.

Typical Installation Errors and How to Avoid Them

Even experienced water-engineers sometimes make mistakes.

1. 🔴 Too little tension. The loop is hanging, does not distribute the load.

   ⚠️ Attention: If the transom is "playing" when moving at full speed, it is a sign of weak tension. Stop immediately and pull up the talreps.

2. 🔴 Twisted cable - reduces strength by 30-40%.

   Check the cable before each operation, if it's twisted, unwrapped and sealed with tape.

3. 🔴 Fixing to D-rings only The rings can be broken off under heavy load.

   Optimally fasten the loop transom with the help of slings or bolts (for rigid transverses).

4. 🔴 Use of knots instead of carbines - the nodes weaken with time.

   Only allowed. gazebo or squawkIt is better to use certified carbines.

🔧 How to check the installation:

1. Put on a trench a person weighing 70-80 kg (equivalent to the engine 10-15 hp).
2. Ask him to swing left-right.
3. If the transom does not bend, and the cable remains in place - the installation is correct.

Maintenance and care: how to extend the life of the node

The end node requires regular maintenance, especially if the boat is operated in salt water or under extreme loads.

What to do:

• 🧼 After every exit flush the cable with fresh water and dry it.
• 🛢️ Once a season, lubricate carbines and talreps silicone (for example, WD-40 Specialist).
• 🔍 Before operation, check the cable on scuffs, knots, corrosion.
• ☀️ Keep the boat with the knot in the shade - UV rays destroy polypropylene in 2-3 seasons.

What to avoid:

• 🚫 Don't use it. engine-oil For lubrication, it attracts dirt.
• 🚫 Do not keep the cable wet – this leads to rotting (even in synthetic materials).
• 🚫 Do not pull the knot "on the eye" - use a dynamometer or scales.

💡 Helpful advice: If the cable starts to "scuffle", do not rush to change it. Melt the ends with a lighter and wrap with tape - this will prolong the life of the cable for 1-2 seasons.

FAQ: Answers to Frequent Questions

Can I make the end of Alexandrov yourself or better buy ready-made?

You can do it yourself if you have experience with cables and nodes. Bars** or "Waterman.") more reliable, as:

• Certified materials are used.
• The loop is already properly sewn and melted.
• There's a guarantee for burst load.

For motors over 10 hp, we recommend buying ready-made solutions.

How often should I check the end node?

Minimum. before each waterfallComplete check (with disassembly and lubrication) carry out:

• Once a month during intensive operation.
• Once a season with rare use.

After a storm or impacts (for example, about a snag), check immediately - microcracks may appear.

Can the end of Alexandrov be used to fasten the sonar?

Yes, but with reservations:

• For light sonars (up to 1 kg), a standard node is sufficient.
• For heavy models (e.g., Lowrance HDS Live) add second-loop Or use a separate sling.
• Do not attach the sonar to the same cable as the motor - vibrations will damage the equipment.

What to do if the cable breaks in the water?

Act on the algorithm:

1. Immediately. gass and turn off the engine.
2. If the engine fell overboard, Don't try to lift it. (Transfer risk) Swim to the shore on oars.
3. On the shore, check the transom for damage, and if the PVC is not torn, you can temporarily attach the engine to the sling from the first aid kit.
4. Only come back to the water after cable-swapping.

Which cable is better, woven or twisted?

For the Alexandrov end node wire-line preferably because:

• It doesn't spin under load.
• Less prone to abrasion.
• It's easier to tie knots.

Twisted cable is cheaper, but wears out faster and can "unplug" when loaded.