The data in Green above is based on the trendline shown in the graph below.

Sonars - SWBS 460

SWBS	ID	Wt	Vol	Crew	Power	Cost	Year		Source
		(t)	(m3)		(kW)	(M$)
w460 - Sonars	SQS-4	13.2	79.3	6	4		40's		S-SD
	SQS-23	28.4	226.5	6	36		50's		S-SD
	SQS-26	27.2							Pre Y
	SQS-53C	87.1							ADA355524
	SQS-53	144	170	5	350	19	FY83		Pre1
	1/2 SQS-53	102	142	5	250	15	FY83		Pre1
	SQS-56	81.3	594.7	9	66		70's		S-SD
	SQS-56	20.7	28	3	106	4	FY83		Pre1
	TACTASS	18	141.6	4	84	6	FY83		Pre1

I currently can't recall the signifigance of the yellow shaded cells.  I believe that these values were estimated from drawings, but I'll have to double check.

Countermeasures - SWBS 470

SWBS	ID	Wt	Vol	Crew	Power	Cost	Year		Source
		(t)	(m3)		(kW)	(M$)
w470 - Counter measures	WLR-1	0.14							Pre y
	EW SLQ-32	4.2	3.4	3	1	3.2	FY83		Pre1
	SLQ-25 (Nixie)	2.8	9	3	9	0.3	FY83		Pre1
	Degaussing							Wt = 0.004 * Full Load Disp

The Green data above based on data for similar ships that suggests that the weight of Degaussing equipment on a ship is about 0.45 of a ship's Full Load Displacement.

Fire Control - SWBS 480

Special Purpose Systems - SWBS 490
 

SWBS	ID	Wt	Vol	Crew	Power	Cost	Year		Source
		(t)	(m3)		(kW)	(M$)
w490	SQS 53 Sonar Fluids	92.7
	Repair Parts & Op Fluids							8% of Rest of w400

Guns & Ammo Handling - SWBS 710

SWBS	ID	Wt	Vol	Crew	Power	Cost	Year		Source
		(t)	(m3)		(kW)	(M$)
w710 Guns & Ammo Handling	203mm/55 Mk71 Mod 0	87.5		6			FY81		Pre 2
	155mm Reg Mag	93.5	563	12.5	50	11	FY83		Pre 1
	130mm AK-130 Twin	35
	127mm/38 Mk30	25.4	161.4	20	20		40's		S-SD
	127mm/54 Mk42	73.2	220.9	4	175		50's		S-SD
	127mm/54 Mk42 Mod 0	66.2	280.7						Pre 3
	127mm/54 Mk42 Mod 9	61.2	280.7	12			FY81		Pre 2
	127mm Reg Mag	72.2	563	12.5	52	4	FY83		Pre 1
	127mm/54 Mk45	46.7	283.2	2	150		70's		S-SD
	127mm/54 Mk45 Mod ?	24.1	277.1						Pre 4
	127mm/54 Mk45 Mod 0	23.9	277.1	6	101		FY81		Pre 2
	127mm/54 Mk45 Mod 2	22.2	277.1	6	101				Pre 5
	127mm/62 Mk45 Mod 4	22.9	277.1	6	105				Pre 5
	127mm/54 OTO	37.5
		34					FY81		Pre 2
	114mm/55 Mk8	26	124.9
		26.2	124.9				FY81		Pre 2
	100mm AK-100 L/70	35
	100mm/55 Mk68	24.9	255.4				FY81		Pre 2
		21	255.4
	76mm/62	7.4	138.9	3	10				Pre 5
		8.2	138.9	3			FY81		Pre 2
		7.5	138.9
	76mm/50 Mk27 (Tw)	14.3							NW
	76mm/50 Mk33 (Tw)	14.7							NW
	76mm/50 Mk34 (S)	7.7							NW
	57mm Mk3	6.8							Pre 5
	Bofors SAK L/70 Mk2	6.7
	40mm Mk3	3.9							Pre 5
	CIWS	9.3	3.4	3.2	170	6.6	FY83		Pre 1

In the above table;

In the table above the cells with Green text represent estimates based on estimates from the trendlines in the plot below.  In this plot of Missile/Rocket Launcher Volume versus Weight, three sets of data are shown where:

• the Blue Squares and Curve represents data for large Vertical Launch Systems (VLSs)
• the Red Diamonds and Curve represents data for large rotating arm launchers (like the USNs Mark 13, 22, and 26)
• the Green Triangles represent data for small launchers like the French Crotale and Italian Albatros systems

Mine Launching Systems - SWBS 730

I currently do not have any data on Mine Launching Systems, but if I get any it will go here.

Depth Charge Launching Systems - SWBS 740

I currently do not have any data on Depth Charge Launching Systems, but if I get any it will go here.

Torpedo Launching Systems - SWBS 750

SWBS	ID	Wt	Vol	Crew	Power	Cost	Year		Source
		(t)	(m3)		(kW)	(M$)
w750 - Torpedoes	Mk 25	0.9
	Mk 16	22.3
	2 Mk 32 Torp	7.9	24	9.2	40	1	FY83		Pre 1
	Mk 32 SVTT Mod 5-7	1							Pre 5
	Mk 32 SVTT Mod 9	2							Pre 5
	Mk 32 SVTT Mod 14	1.1							Pre 5

Small Arms & Pyrotechnics - SWBS 760

In general it appears that a valueof about 2.0 t is a suitable estimate for the weight of Small Arms & Pyrotechnics for Post WWII Surface Combatants.

Cargo Munitions - SWBS 770

First, here are two figures relating Total Displacement to Combat System Weight.  If the total displacement of a ship is not known then once an estimate of combat system weight is determined from the above table, and estimate of total ship displacement can be made from these figures.  In these two figures I have included two curves.  One is based primarily on US Navy Ships (labeled USN) and the other based primarily on nuclear ships (labeled USN(N)).

Next, here is a figure relating vessel length (on waterline) to displacement.  It can be used to estimate a design's length based on the overall total displacement of the vessel.

Here is a graph of Beam vs Length, which can be used to estimate the beam of a design.

Here is a plot of Depth vs Length, which can be used to estimate the depth of a vessels hull (from the keel to the weatherdeck) if that data is not known.

Here is a figure relating installed Propulsion Power per Ton Displacement x Speed to a non-dimensional speed for the vessel.  It can be used to make a first estimate of the total power that will be required for the vessel, based on its total displacement and intended maximum service speed.   

Additionally, I have also included a second figure directly relating installed power to a "powering coefficient" as a secondary (backup) means of making an initial estimate of required installed power.  Here the "powering coefficient" is defined as:

Here is a figure relating total installed Generating Power versus Full Load Displacement.  It can be used to make an initial rough estimate of the total installed generating power that will be required onboard a vessel.

And finally, here is a figure relating the total number of accommodations on a vessel divided by the total displacement of the vessel (# accommodations/mt) versus the year the vessel entered service (or was intended to enter service for design studies).  It can be used to make a first estimate of total crew accommodations onboard a vessel.