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Bangladesh Navy

DWT??!!?? That's not an appropriate measure in this context.

Deadweight tonnage (also known as deadweight; abbreviated to DWT, D.W.T., d.w.t., or dwt) or tons deadweight (TDW) is a measure of how much mass a ship is carrying or can safely carry;[1][2][3] it does not include the weight of the ship. DWT is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew.

Deadweight tonnage is a measure of a vessel's weight carrying capacity, and does not include the weight of the ship itself. It should not be confused with displacement (weight of water displaced) which includes the ship's own weight, nor other volume or capacity measures such as gross tonnage or net tonnage (or their more archaic forms gross register tonnage or net register tonnage).

See DISPLACEMENT https://en.wikipedia.org/wiki/Displacement_(ship)
For a warship we typically use standard and/or full load displacement

The Dutch frigate HMS Van Amstel (F-831), a Doorman class M-frigate of the Dutch navy.
Displacement: 2,800 tons standard; 3,320 tons full load
Dimensions: Length 122.3m x Beam 14.4m x Draught 6.1m

That's similar to e.g. Meko 200PN/TN
HMS_Van_Amstel_F831_USN-8154G-232_cropped.jpg





BNS Bangabundhu
Displacement: 2400-2500 tons full load
DImensions: Length: 103.7 m x Beam: 12.5 m x Draught: 3.8 m (12 ft)

It is typically classified a light frigate. Much like the Chinese Type 053H3 or Sigma 10513/10514


High performance is ust a marketing term. The Chinese ship has not waterjets for sprints (top speed listed as 28kn!) and there a numerous smaller ships that also have stealth features
Chinese+New+High+Performance+Frigate+export+pakistaChinese+New+High+Performance+Frigate+%25288%2529.jpg





Depending on ships size, a minimum number of missiles/VLS-cells may apply. However, there are examples of very small ships with multipacked VLS cells (e.g. UAE Baynunah class


Confused now :(

Is there any news when Chittagong Dry Dock will start its operations for BN?

@Bilal9 would know about this
 
Well spoken and thanks for the historical tidbits.

Bangladesh is very lacking in this field - no one is arguing that point.

Turboprop trainer should be the first step. We already set up an AF aeronautical center in 2011 and parts mfg. has started.

bangladesh-navy-shows-interest-stealth-frigates.jpg


Stealth Frigate? Which model?

Eibar Buijha Naow :-)

There are some Bangladeshi engineers working in Boeing according to Indonesian engineers working in Boeing as supervisor/manager. You can start from them. Both design and manufacturing capability needs to be developed to establish good aerospace industry.
 
Ciao,are they delivered yet?

indicates this July there will be a change flag,
1466706431.jpg


PL-71 SYED NAZRUL
in this photo 100% power, reached the 24.05 knots, compared to the same ship during tests in 1988 had reached 24.3 knots at full power
1467137909.jpg


Photo -naviearmatori /lobito1971
 
indicates this July there will be a change flag,
1466706431.jpg


PL-71 SYED NAZRUL
in this photo 100% power, reached the 24.05 knots, compared to the same ship during tests in 1988 had reached 24.3 knots at full power
1467137909.jpg


Photo -naviearmatori /lobito1971


YaY! We are getting them this month!
 
As far as I understand, a dry dock is meant for ship repairing and maintenance, and a dock yard is for building new ships.
 
DWT??!!?? That's not an appropriate measure in this context.

Deadweight tonnage (also known as deadweight; abbreviated to DWT, D.W.T., d.w.t., or dwt) or tons deadweight (TDW) is a measure of how much mass a ship is carrying or can safely carry; it does not include the weight of the ship. DWT is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew etc.

So, deadweight tonnage is a measure of a vessel's weight carrying capacity, and does not include the weight of the ship itself. It should not be confused with displacement (weight of water displaced by the hull) which includes the ship's own weight, nor with other volume or capacity measures such as gross tonnage or net tonnage (or their more archaic forms gross register tonnage or net register tonnage).

See DISPLACEMENT https://en.wikipedia.org/wiki/Displacement_(ship)
For a warship, we typically use standard and/or full load displacement

The Dutch frigate HMS Van Amstel (F-831), a Doorman class M-frigate of the Dutch navy.
Displacement: 2,800 tons standard; 3,320 tons full load
Dimensions: Length 122.3m x Beam 14.4m x Draught 6.1m
That's similar to e.g. Meko 200PN/TN.
This has 16 VL cells mounted up against the portside hangar exterior, initially for Sea Sparrow VL, but now duo-packed with ESSM. Can mount another Goalkeeper forward of the bridge.
HMS_Van_Amstel_F831_USN-8154G-232_cropped.jpg



BNS Bangabundhu
Displacement: 2400-2500 tons full load
DImensions: Length: 103.7 m x Beam: 12.5 m x Draught: 3.8 m (12 ft)

It is typically classified a light frigate. Much like the Chinese Type 053H3 or Sigma 10513/10514



An 8-cell mk41 selfdefence launcher (i.e. the shortest variant) weighs just 26,800 lbs (12,156 kilograms). A single ESSM missile weighs 620 lb (280 kg), so 32 missiles would weigh 19,840lbs (8,960 kg). So, a Mk41 with 32 ESSM weight just a tad over 21 tons. Why exactly would that necessitate a much larger ship (i.e. 3000 tons, rather than 2000 tons)?

The Dutch ship above uses 16 cells Mk 48 Mod GMLS with 32 ESSM for a total weight of 26,428 lbs = 11,988 kilograms. Single packed with Sea Sparrow VL, that would be 13,278 lbs = 6023 kilograms.
https://en.wikipedia.org/wiki/RIM-162_ESSM

Mind for a semi-active radar homer like Sea Sparrow or ESSM, one needs to have radar target illumination, so you may have to add APAR ( above deck weight < 11 ton) or a pair of Stir 1.8 or 2.4 (the latter each weigh 2.2 ton > total 4.4 ton)

Together with mk41/32ESSM, that makes a worst case scenario of adding 32 tons.


High performance is ust a marketing term. The Chinese ship has not waterjets for sprints (top speed listed as 28kn!) and there a numerous smaller ships that also have stealth features
Chinese+New+High+Performance+Frigate+export+pakistaChinese+New+High+Performance+Frigate+%25288%2529.jpg





UAE Baynunah
UAE+Baynunah+Class+Multi-Role+Guided+Missile+Corvettes+export+pakistan+saudiarabia+missile+c802+c803+hq016+essm+MK56+eight-cell+vertical+launchers+for+RIM-162+ESSM+21-cell+RAM+launcher+for+RAM+block+1A+%25282%2529.jpg


Depending on ships size, a minimum number of missiles/VLS-cells may apply. However, there are examples of even very small ships with multipacked VLS cells (e.g. 915 ton UAE Baynunah class 2x2 cells > 8 ESSM, in addition to 21 RAM). Danish navy stanflex weapons module holds a six cell vls for 12 ESSM and can go on ships as small as the 450 ton fld Stanflex 300 fast patrol boats. For a larger corvette of small frigate, however, 16 VL missiles would seem a reasonable minimum, in the absense of e.g. a 21-missile RAM launcher.

Stanflex-300 with 6 VL Sea Sparrow, 4 Harpoon, 2 heavy torpedotubes and 76mm
flyvefisken-p557-glenten.jpg


For a given number of fire control channels, adding more missiles just adds to endurance, not firepower/ability to deal with more targets simultaneously. In that sense, a homing missile (IR, RF or active radar) that can lock on before and/or after launchs is more advantageous.
For the chinse HPF, quadpacking would free up other cells for use with different missiles e.g. land attack or anti-submarine.
It is not obvious that 2 AK630 clones and an 8 cell FL3000N make a better inner layer defence than e.g. 2 Type 730 gatlings. IMHO, given where they are located, the small guns aren't even intended primarily as AAA but rather as anti-surface weapon. And each Type 730 can probably engage at least 8 times (I know Goalkeeper can) and can deal with threat coming in from 2 sides simulaneously, versus 1 missile launcher with 8 rounds.

Thanks for taking the time to elaborate, excellent post as usual - I stand corrected as you have mentioned!

I'd elaborate as well as I have some questions, but please afford me some time as other obligations have cropped up. All in good time Sir! :-) :tup:
 
indicates this July there will be a change flag,
1466706431.jpg


PL-71 SYED NAZRUL
in this photo 100% power, reached the 24.05 knots, compared to the same ship during tests in 1988 had reached 24.3 knots at full power
1467137909.jpg


Photo -naviearmatori /lobito1971
So they are good as new now. I hope the amenities for the sailors also renovated .
 
Thanks for taking the time to elaborate, excellent post as usual - I stand corrected as you have mentioned!

I'd elaborate as well as I have some questions, but please afford me some time as other obligations have cropped up. All in good time Sir! :-) :tup:
@Bilal9: I willl see you when I see you (when you're ready ;-)
 
How about getting a few more Bns Bangabandhu for BD navy?
Too small for their need. And S. Korea now offers more updated frigates like Incheon Class. BN should divert funds to acquire which has more offensive and defensive value.
excellent idea. :cheers:

Maybe in 2000,but now? No.


Let me explain my opinion.
Can DW2000 class accommodate a VLS?
No.
Can it accommodate a good air defense capability?
NO.

It has a strong EW and ECM,Datalink capability,but Type 56 is not lacking in these fields either.And we can modify future platforms to carry more upgraded capabilities too.

So why should we want them?for the role of patrol frigates?

Type 53 and Hamilton class will serve till 2030,maybe through 2030's til almost '40.

Cost Guard is taking up the general maritime policing duties and patrols. After induction of The Minerva class BN will stop mid endurance policing.They will concentrate on Sovereign patrols and Blue water High Endurance patrols.

The goal is to attain blue water capability.Not to bog down in the Brown Water .

BN's inductions gives the idea that,they will replace under 2000 tons with Type 56 ,under 1000 tons with Durjoy class.
I am all for a platform near 2500 ton,but don't you see it will only over burden Induction and maintenance funds?

That DW 2000 costed more than 200 million!!!!!!!!!!!!!!!! With that money per ship we can easily pick up a Chinese design maybe with TOT too!!! :cheers:

Right now there is too may platforms to maintain.They have to easy up the logistical chain.
 
Last edited:
Too small for their need. And S. Korea now offers more updated frigates like Incheon Class. BN should divert funds to acquire which has more offensive and defensive value.


Maybe in 2000,but now? No.


Let me explain my opinion.
Can DW2000 class accommodate a VLS?
No.
Can it accommodate a good air defense capability?
NO.

It has a strong EW and ECM,Datalink capability,but Type 56 is not lacking in these fields either.And we can modify future platforms to carry more upgraded capabilities too.

So why should we want them?for the role of patrol frigates?

Type 53 and Hamilton class will serve till 2030,maybe through 2030's til almost '40.

Cost Guard is taking up the general maritime policing duties and patrols. After induction of The Minerva class BN will stop mid endurance policing.They will concentrate on Sovereign patrols and Blue water High Endurance patrols.

The goal is to attain blue water capability.Not to bog down in the Brown Water .

BN's inductions gives the idea that,they will replace under 2000 tons with Type 56 ,under 1000 tons with Durjoy class.
I am all for a platform near 2500 ton,but don't you see it will only over burden Induction and maintenance funds?

That DW 2000 costed more than 200 million!!!!!!!!!!!!!!!! With that money per ship we can easily pick up a Chinese design maybe with TOT too!!! :cheers:

Right now there is too may platforms to maintain.They have to easy up the logistical chain.
I think if we go for a new frigate now. We should strive for one with TOT for easy manufacture and maintenance
 
Too small for their need. And S. Korea now offers more updated frigates like Incheon Class. BN should divert funds to acquire which has more offensive and defensive value.


Maybe in 2000,but now? No.


Let me explain my opinion.
Can DW2000 class accommodate a VLS?
No.
Can it accommodate a good air defense capability?
NO.

It has a strong EW and ECM,Datalink capability,but Type 56 is not lacking in these fields either.And we can modify future platforms to carry more upgraded capabilities too.

So why should we want them?for the role of patrol frigates?

Type 53 and Hamilton class will serve till 2030,maybe through 2030's til almost '40.

Cost Guard is taking up the general maritime policing duties and patrols. After induction of The Minerva class BN will stop mid endurance policing.They will concentrate on Sovereign patrols and Blue water High Endurance patrols.

The goal is to attain blue water capability.Not to bog down in the Brown Water .

BN's inductions gives the idea that,they will replace under 2000 tons with Type 56 ,under 1000 tons with Durjoy class.
I am all for a platform near 2500 ton,but don't you see it will only over burden Induction and maintenance funds?

That DW 2000 costed more than 200 million!!!!!!!!!!!!!!!! With that money per ship we can easily pick up a Chinese design maybe with TOT too!!! :cheers:

Right now there is too may platforms to maintain.They have to easy up the logistical chain.

bns bangabundhu classified as a ulsan class frigate. and hare is the photo of ROK ulsan class frigate.............:enjoy:
Port_view_of_ROK_ship_Kyong_Buk_%28FF_956%29_near_San_Diego%2C_CA.jpeg


BUT bns f-25 looks like this..................:enjoy:
Bangladesh_Navy_Ship_Bangabandhu_(F-25).jpg



for me it,s more look like to https://en.wikipedia.org/wiki/Chungmugong_Yi_Sun-sin-class_destroyer.:D
IMG1385.jpg


i would not mind if we are getting this.............:D
 

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