Life buoy SI (Self Igniting) Light Repair and Replacement

Hope at Sea (Prasobh Sugadhan)
1 follower
3 Video Views·Apr 23, 2026
This is a video detailing the procedure to reinstall a SI (Self Igniting) Light of a life buoy.
To find out its expiry date, Battery replacement dates and Weekly checks.
Remember, half of the ship's lifebuoy should be with SI lights and out of it, atleast two (2) should be with smoke.
I hope you will find this video useful for your future career paths ❤️
Good afternoon, so this is a self-igniting light of a lifebuoy
So the third officer had done his
weekly
Checks and found that one of the SI lights has been broken
Remember this SI light even though it is checked every week
Monthly and quarterly there is an expiry date for the SI light
The complete set has to be changed in around five years that depends on the manufacturer
And I once you replace this and once we open the box. I will show you where to check it
So let us check. What was the fault so he's going to open the SI light
what
we found out was the SI light bulb had broken and
There was a little bit of water coming into the SI light
So there was some problem with the o-ring
So the company had provided us with new SI lights
so we'll unbox it and
Change the SI light
So this is basically our new self-igniting light. So these are the characteristics. We'll show you the characteristics
Then once we open the whole box the SI light comes with
All the attachments excluding the battery you can see it is not having any
Any batteries they are giving you the whole set excluding the battery and in the SI light
They will give you the installment date
You can see written there are
the manufacturer check the bottom so that is the manufacturing date of the SI light and
The period of validity of this SI light as a whole is
five years
So this is basically
the time for battery replacement is one year and
For validity of the whole SI light set is five years
So once you install it after five years you have to replace the SI light set as a whole
Now the working principle of an SI light is basically there is a mercury switch somewhere here that
Activates as soon as you turn the SI light upside
So we'll open the whole thing
I'll show you what it what is inside one of the basic checks that we have to carry out every week is
to see whether this is watertight this o-ring should not be damaged and
the battery and
So this is how an SI light will open up as you can see it's a long
It's a long tube with the place for battery to go inside
So we'll insert the battery remember SI light will not come with the battery you have to order the battery separately
This is basically the four batteries the batteries should be D size and how to insert it is
inside this
you can see one is flat surface that will be the positive and
Another will be having a spring I
Believe you can see that so
We will insert the batteries into the SI light
remember batteries have to be changed every one year and
So this is how you insert it the last battery you push it up
Then you will get a space to put the
Fourth battery and we will check the SI light. Okay, the SI light is working
You can see once it is turned upside. It is working. So we will integrate the whole SI light and
Put it on our
life boy
There is a mercury switch
Between the bulb and the battery that activates this SI light once it turns upside
Remember the SI light is provided
With a piece of rope to tie to the back to the lifebuoy as well as the stand
So we are having the old stand. So we will be using the old stand. So let us replace our lifebuoy
SI light with a new one
so the third mate is going to
replace
The old SI light with the new one. It will just try it out with the
Stand so
It is a perfect fit and he will tie it with the life life boy
Remember the length of this has to be
Sufficient so that it can float
along with this is how the
SI light has been installed
Remember the SI light validity is for five years the whole set and the batteries should be checked
Replaced everyone one year
The weekly monthly and quarterly test as per your company PMS
I hope you understood and got a good understanding of how an SI light works their expiry date
Thank you
