@@MerchantNavyLifes hi there,well i just wanna know ,if you test the BHC of the mooring winch..after fully tight the break, WHAT IS THE POSITION OF THE GEAR, is that engage or dis engage? Thank you
Capt. please can you help clarify is the WLL same as the MBL , and should certificate always contain MLB value ? or sometimes only WLL , and is it possible to calculate from WLL to get MBL. Thanks !
Negative bro!! WLL is not same as MBL. Normally for ropes WLL=MBL/SF . But in the rope's certificate easily you can find the MBL value. And we should use only MBL value.
It is Typically, mooring winch brakes are designed to hold up to 80% of the MBL with the capability of adjusting these to 60% of the MBL to allow for a margin of safety. 80% is the ISO limit. Its not good to set the limit for 100%. It should be set to a lower value than MBL. Because main purpose of this is to prevent excessive load to the winch motor.
There are basically 2 values BHC brake holding capacity and BRC brake rendering capacity. BHC value should be 80% of the MBL i.e. minimum breaking load of your mooring wire/rope. A typical mooring wire of a VLCC has an MBL of 115 Tonnes. That means your BHC should be atleast 80% of this value which comes out as 92 tonnes. However considering frequency of your mooring operations , Age of your mooring wires and exposure to harsh conditions a 20% safety margin is used to totally rule out any chances of mooring wires breaking. Hence the BRC value which is always 60% of your wire's MBL , which in this case would be 69 tonnes. Always mark 80% and 60% on your winch breaks. Breaks are supposed to slip. That's the whole purpose of them. You don't want to set them at 100% and wait for your mooring wire to break.
Its for the adjustment ... for winches and for windless, gap clearance will be different .. normally winches clearance is little bit more than windless clearance .. specific data you may find in your mooring management plan.
Why did you slack the break on 80%percent or 60 percent value? Off course it will slip. You should continue pumping the jack until the mooring winch render from 80 percent or 60 percent as per calculation then if not render continue pumping until it render. then record the new value and adjust the 80 percent and 60 percent then mark on mooring winch.
Thanks for bringing up the point. Obviously you are correct. According to MEG4,newly introduced SDMBL should be the initial reference for the BHC test. This video is little bit older as When a ship is built, the mooring winches are equipped with mooring lines of a MBL roughly equal to the SDMBL. Anyway all procedures are same as instructed in the video and we have to use SDMBL instead of MLMBL. If existing ships are built as MEG3//Refer to Intertanko Guigance => if there is original SDMBL not available, BHC must me determined from the manufactur's certification and Calculated SDMBL = 125% * mooring winch designed brake maximum holding load.
Hellow if my SDMBL is 75T to convert in KN is 588 KN , which means 60% is 441 KN , but your manometer goes only untill 250 kn ? Are my calculation wrong ?
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@@MerchantNavyLifes hi there,well i just wanna know ,if you test the BHC of the mooring winch..after fully tight the break, WHAT IS THE POSITION OF THE GEAR, is that engage or dis engage? Thank you
@@vincentreyes2016 Gear should disengaged !! :)
@@MerchantNavyLifes many thanks
@@vincentreyes2016 uwc :)
Thanks alot my capt
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this helped thanks
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Very informative video, thank you
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Capt. please can you help clarify is the WLL same as the MBL , and should certificate always contain MLB value ? or sometimes only WLL , and is it possible to calculate from WLL to get MBL. Thanks !
Negative bro!! WLL is not same as MBL. Normally for ropes WLL=MBL/SF . But in the rope's certificate easily you can find the MBL value. And we should use only MBL value.
So capt..for rendering point set always set to 60% and 80%? My vessel also has 2 marker, but set 100% and 80%..help me to clear this issue
It is Typically, mooring winch
brakes are designed to hold up to 80% of the MBL with
the capability of adjusting these to 60% of the MBL to
allow for a margin of safety.
80% is the ISO limit. Its not good to set the limit for 100%. It should be set to a lower value than MBL. Because main purpose of this is to prevent excessive load to the winch motor.
There are basically 2 values BHC brake holding capacity and BRC brake rendering capacity. BHC value should be 80% of the MBL i.e. minimum breaking load of your mooring wire/rope. A typical mooring wire of a VLCC has an MBL of 115 Tonnes. That means your BHC should be atleast 80% of this value which comes out as 92 tonnes. However considering frequency of your mooring operations , Age of your mooring wires and exposure to harsh conditions a 20% safety margin is used to totally rule out any chances of mooring wires breaking. Hence the BRC value which is always 60% of your wire's MBL , which in this case would be 69 tonnes. Always mark 80% and 60% on your winch breaks. Breaks are supposed to slip. That's the whole purpose of them. You don't want to set them at 100% and wait for your mooring wire to break.
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Veryy veryy interesting video i liked this
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Merchant Navy Life np broo i just unsubed and subbed back cuz I was subscribed to you and please do the same as me don’t unsub be permanent 🔥
Interesting video! Thanks for sharing! Liked and subbed. See you soon!
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very nice ...6 likes ..
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Hi!! nice video, please can you share the excel calculation sheet with the formule
Drop me your email and i'll send it to you!
@@MerchantNavyLifes pls share with me too.
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MY DEAR , CAN YOU INFORM ME WHATS THE USUAL MEASUREMENT OF BEARING SUPORT FRAME(BEARING BRAKET)?
Sir wat is the time interval of brake testing?
Its depend of sms. But normally every one year!!
Helpful
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Good video
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it is awesome...
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Subbed
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Sir can u please tell me mooring winches ya windlass bfore liners there is one stud like bolt we keep distance 3cm that bolt wats the use??
Its for the adjustment ... for winches and for windless, gap clearance will be different .. normally winches clearance is little bit more than windless clearance .. specific data you may find in your mooring management plan.
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Why did you slack the break on 80%percent or 60 percent value? Off course it will slip. You should continue pumping the jack until the mooring winch render from 80 percent or 60 percent as per calculation then if not render continue pumping until it render. then record the new value and adjust the 80 percent and 60 percent then mark on mooring winch.
nice video
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sir would u like to give me JF calculation
Drop me your email please! 😇
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Navy done with 5
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Can u put excel sheet here?
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this is wrong as per meg4 we use SDMBL Not LineMBL
Thanks for bringing up the point. Obviously you are correct. According to MEG4,newly introduced SDMBL should be the initial reference for the BHC test. This video is little bit older as When a ship is built, the mooring winches are equipped with mooring lines of a MBL roughly equal to the SDMBL. Anyway all procedures are same as instructed in the video and we have to use SDMBL instead of MLMBL.
If existing ships are built as MEG3//Refer to Intertanko Guigance => if there is original SDMBL not available, BHC must me determined from the manufactur's certification and Calculated SDMBL = 125% * mooring winch designed brake maximum holding load.
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Hellow if my SDMBL is 75T to convert in KN is 588 KN , which means 60% is 441 KN , but your manometer goes only untill 250 kn ? Are my calculation wrong ?
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What grade math is this?
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