MOB Kit. TREM Security Throwing line

The TREM Security Throwing Line

There are several scenarios where you will stop the boat a short distance away from the MOB:-

  • A crash stop either as the MOB goes overboard or immediately after they hit the water.
  • In rough seas where it is dangerous for the MOB casualty to be close to a moving yacht
  • Sailing shorthanded where you are the only person left on the boat and you want to maintain visual contact at all times.

The TREM Security Rope is designed to help bring make contact with the MOB and bring them alongside


What you get.

When you unpack the TREM Security Rope you see a bright orange bag containing 30m 6mm Polyethylene  floating line with a black strop on the end.  It is weighted to help you with the throw and because the bag is lined with closed cell foam it will float.

Picture of TREM security rope equipment for rescuing Man Overboards. on white background. Orange bag, white loop. bloack loop. orange rope

TREM Security rope MOB Throwing Line

Picture of the TREM Security Line (throwing line) for Man Overboard rescues

Trem Security Rope (Throwing Line).  Weighted to help the throw and buoyant because it is lined with closed cell foam.


The throwing and re-packing instructions permanently printed on the TREM bag.

Trem Throwin line

The instructions are on the outside of the bag.

How to use.

You reach inside and grab the black loop and then use your strongest throwing arm to hold the top of the bag. It is recommended that you throw it underarm but I find it catches on the guard rails when throwing from a yacht so for me the best is an overarm lob.

Trem Throwin line

Reach inside and grab the black loop.

Trem Throwin line

Inside the bag there is a weight at the bottom and it is lined with closed cell foam to make it buoyant.


Your MOB can slip their hand through the white loop and pull the woggle tight so that as you drag them in they don't have to do anything.  They may not have a lot of grip left, so this makes it easy.


picture of the white loop on a TREM throwing line. The MOB slips their hand through so that they don't ned to grab the line.

White loop for the MOB to slip their hand through


A velcro tab at the top of the TREM bag helps you keep the rope safely in the bag whilst it is stowed away. The instructions are on the outside of the bag.


picture of the velcro tab on the TREM security rope for Man Overboard Recovery

The velcro tab keeps it safe during storage.


You can recoil the rescue line and put it back into the bag and reused again. It's simple to repack and there is plenty of space inside the TREM bag.  The instructions ask you to do it differently to the way it is supplied though, taking more time to coil it into the bag in layers versus coiling it all up and putting it in.

Picture of the Trem Security throwing line on a plain white background.

The line can be coiled and repacked after use.  Practice practice practice!

What is it like to throw.

It is really easy to use.  The first throw was done with it straight out of the packaging.  It went well and nearly all of the line came out.  The second throw was done after it was pulled back in, with two coils of rope and the bag filled with water.  This made it go further and I could really feel the difference.

Picture of Andy Burton holding the TREM Survivor Rope

Open the bag and reach inside the TREM Survivor Rope to pull out the black loop


Picture of Andy Burton with his hand through the black loop of the TREM Security rope

Hold the bag with your strongest hand and put your other hand through the loop.

Picture of Andy Burton about to throw the TREM Survivor strop. In the background there is sea and shoreline and houses.

Throw the TREM Survivor Rope underarm

Picture showing the TREM Security Rope after it has been thrown into the sea.

The orange bag and rope of the TREM Security Rope stand out in the water.


Picture of Andy Burton holding the TREM Survivor strop after using it - the rope is gathered up into two loops and one is held in each hand. In the background there is sea and shoreline and houses.

To throw it again hold the rope in two loops.


Want more practice using TREM throwing lines?

Maybe you've been on the RYA / ISAF coastal Safety Coarse and found the MOB recovery part interesting or perhaps you've just done your Dayskipper or Yachtmaster practicals and run through the MOB procedures.  

Want to do more MOB?  If so, we have a couple of options for Man Overboard Rescue training, both of which are free.  All I ask is that I can use any photos I take on the website, social media, magazine articles etc.

Yacht clubs - I can run half day sessions on your yachts as part of your regular sailing weekends.  Why not finish a cruise on Sunday lunchtime and spend the afternoon learning 5 MOB techniques.

Own boat sessions - anything from a few hours to a full day using all the equipment on your yacht.

As long as your within a few hours drive of Jct 13 on the M25 I'll come along and you can try anything you want.

If you are interested in trying any of these MOB equipment out yourself then please contact me at or use the contact form.  If you have time, can you add some info on if you are a Dayskipper, Coastal Skipper or Yachtmaster and if you've done the RYA Sea Survival or the RYA / ISAF Coastal Safety course.