WesWorld

A planned refit in 1930 for Tyrrhenia

Cost is 15% of light displacement or 4,510 tons over 6 months (unless I'm incorrect)

Tyrrhenia, Enter country Enter ship type laid down 1913

Displacement:
30,063 t light; 32,296 t standard; 33,914 t normal; 35,208 t full load

Dimensions: Length overall / water x beam x draught
664.94 ft / 660.00 ft x 92.00 ft (Bulges 102.00 ft) x 29.00 ft (normal load)
202.67 m / 201.17 m x 28.04 m (Bulges 31.09 m) x 8.84 m

Armament:
12 - 14.00" / 356 mm guns (4x3 guns), 1,372.00lbs / 622.33kg shells, 1913 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in casemate mounts
on side, all amidships
8 - 3.00" / 76.2 mm guns (4x2 guns), 13.50lbs / 6.12kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.57" / 39.9 mm guns (4x2 guns), 1.93lbs / 0.88kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
18 - 0.79" / 20.1 mm guns (6x3 guns), 0.25lbs / 0.11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 18,320 lbs / 8,310 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
Ends: 4.00" / 102 mm 210.00 ft / 64.01 m 10.00 ft / 3.05 m
30.00 ft / 9.14 m Unarmoured ends
Upper: 6.00" / 152 mm 420.00 ft / 128.02 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length

- Torpedo Bulkhead and Bulges:
1.25" / 32 mm 420.00 ft / 128.02 m 27.00 ft / 8.23 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 381 mm 9.00" / 229 mm 10.0" / 254 mm
2nd: 6.00" / 152 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 12.00" / 305 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,730 shp / 35,606 Kw = 22.50 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 2,912 tons

Complement:
1,249 - 1,624

Cost:
£3.532 million / $14.128 million

Distribution of weights at normal displacement:
Armament: 2,290 tons, 6.8 %
Armour: 11,352 tons, 33.5 %
- Belts: 4,251 tons, 12.5 %
- Torpedo bulkhead: 524 tons, 1.5 %
- Armament: 3,409 tons, 10.1 %
- Armour Deck: 2,897 tons, 8.5 %
- Conning Tower: 271 tons, 0.8 %
Machinery: 1,870 tons, 5.5 %
Hull, fittings & equipment: 14,501 tons, 42.8 %
Fuel, ammunition & stores: 3,851 tons, 11.4 %
Miscellaneous weights: 50 tons, 0.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
47,139 lbs / 21,382 Kg = 34.4 x 14.0 " / 356 mm shells or 7.1 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.2 ft / 1.6 m
Roll period: 18.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.92
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.608
Length to Beam Ratio: 6.47 : 1
'Natural speed' for length: 25.69 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (18 %): 27.00 ft / 8.23 m (26.00 ft / 7.92 m aft of break)
- Mid (68 %): 26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (16 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 23.05 ft / 7.03 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.4 %
- Above water (accommodation/working, high = better): 160.9 %
Waterplane Area: 44,742 Square feet or 4,157 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 219 lbs/sq ft or 1,067 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.63
- Overall: 1.05
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

---------------------------------------------------------------------------------------------------------------

Tyrrhenia, Enter country Enter ship type laid down 1913

Displacement:
30,068 t light; 32,296 t standard; 33,914 t normal; 35,208 t full load

Dimensions: Length overall / water x beam x draught
664.94 ft / 660.00 ft x 92.00 ft (Bulges 102.00 ft) x 29.00 ft (normal load)
202.67 m / 201.17 m x 28.04 m (Bulges 31.09 m) x 8.84 m

Armament:
12 - 14.00" / 356 mm guns (4x3 guns), 1,372.00lbs / 622.33kg shells, 1913 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in casemate mounts
on side, all amidships
6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1913 Model
Quick firing guns in deck mounts
on side, evenly spread
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
Quick firing guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1918 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 18,277 lbs / 8,290 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
Ends: 4.00" / 102 mm 210.00 ft / 64.01 m 10.00 ft / 3.05 m
30.00 ft / 9.14 m Unarmoured ends
Upper: 6.00" / 152 mm 420.00 ft / 128.02 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length

- Torpedo Bulkhead and Bulges:
1.25" / 32 mm 420.00 ft / 128.02 m 27.00 ft / 8.23 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 381 mm 9.00" / 229 mm 10.0" / 254 mm
2nd: 6.00" / 152 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 12.00" / 305 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,730 shp / 35,606 Kw = 22.50 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 2,912 tons

Complement:
1,249 - 1,624

Cost:
£3.527 million / $14.109 million

Distribution of weights at normal displacement:
Armament: 2,285 tons, 6.7 %
Armour: 11,352 tons, 33.5 %
- Belts: 4,251 tons, 12.5 %
- Torpedo bulkhead: 524 tons, 1.5 %
- Armament: 3,409 tons, 10.1 %
- Armour Deck: 2,897 tons, 8.5 %
- Conning Tower: 271 tons, 0.8 %
Machinery: 1,870 tons, 5.5 %
Hull, fittings & equipment: 14,561 tons, 42.9 %
Fuel, ammunition & stores: 3,846 tons, 11.3 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
47,344 lbs / 21,475 Kg = 34.5 x 14.0 " / 356 mm shells or 7.2 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.2 ft / 1.6 m
Roll period: 18.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.92
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.608
Length to Beam Ratio: 6.47 : 1
'Natural speed' for length: 25.69 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (18 %): 27.00 ft / 8.23 m (26.00 ft / 7.92 m aft of break)
- Mid (68 %): 26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (16 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 23.05 ft / 7.03 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.0 %
- Above water (accommodation/working, high = better): 160.9 %
Waterplane Area: 44,742 Square feet or 4,157 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 219 lbs/sq ft or 1,071 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.64
- Overall: 1.06
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

I can't see much change. What has been altered?

Looks like the changes were to the AA battery, it's a little heavier now.

Correct, that and a few minor cosmetic changes to the superstructure.

Redesigned, double the 3" armament and additional 4x40mm.

Tyrrhenia, Enter country Enter ship type laid down 1913

Displacement:
30,050 t light; 32,296 t standard; 33,914 t normal; 35,208 t full load

Dimensions: Length overall / water x beam x draught
664.94 ft / 660.00 ft x 92.00 ft (Bulges 102.00 ft) x 29.00 ft (normal load)
202.67 m / 201.17 m x 28.04 m (Bulges 31.09 m) x 8.84 m

Armament:
12 - 14.00" / 356 mm guns (4x3 guns), 1,372.00lbs / 622.33kg shells, 1913 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1913 Model
Breech loading guns in casemate mounts
on side, all amidships
16 - 3.00" / 76.2 mm guns (8x2 guns), 13.50lbs / 6.12kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
12 - 1.57" / 39.9 mm guns (6x2 guns), 1.93lbs / 0.88kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
18 - 0.79" / 20.1 mm guns (6x3 guns), 0.25lbs / 0.11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 18,436 lbs / 8,362 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 420.00 ft / 128.02 m 12.00 ft / 3.66 m
Ends: 4.00" / 102 mm 210.00 ft / 64.01 m 10.00 ft / 3.05 m
30.00 ft / 9.14 m Unarmoured ends
Upper: 6.00" / 152 mm 420.00 ft / 128.02 m 8.00 ft / 2.44 m
Main Belt covers 98 % of normal length

- Torpedo Bulkhead and Bulges:
1.25" / 32 mm 420.00 ft / 128.02 m 27.00 ft / 8.23 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.0" / 381 mm 9.00" / 229 mm 10.0" / 254 mm
2nd: 6.00" / 152 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 3.50" / 89 mm, Conning tower: 12.00" / 305 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 47,730 shp / 35,606 Kw = 22.50 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 2,912 tons

Complement:
1,249 - 1,624

Cost:
£3.545 million / $14.179 million

Distribution of weights at normal displacement:
Armament: 2,304 tons, 6.8 %
Armour: 11,361 tons, 33.5 %
- Belts: 4,251 tons, 12.5 %
- Torpedo bulkhead: 524 tons, 1.5 %
- Armament: 3,418 tons, 10.1 %
- Armour Deck: 2,897 tons, 8.5 %
- Conning Tower: 271 tons, 0.8 %
Machinery: 1,870 tons, 5.5 %
Hull, fittings & equipment: 14,414 tons, 42.5 %
Fuel, ammunition & stores: 3,864 tons, 11.4 %
Miscellaneous weights: 100 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
46,805 lbs / 21,230 Kg = 34.1 x 14.0 " / 356 mm shells or 7.0 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.1 ft / 1.6 m
Roll period: 18.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.92
Seaboat quality (Average = 1.00): 1.53

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
Block coefficient: 0.608
Length to Beam Ratio: 6.47 : 1
'Natural speed' for length: 25.69 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (18 %): 27.00 ft / 8.23 m (26.00 ft / 7.92 m aft of break)
- Mid (68 %): 26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (16 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 23.05 ft / 7.03 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.0 %
- Above water (accommodation/working, high = better): 160.9 %
Waterplane Area: 44,742 Square feet or 4,157 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 217 lbs/sq ft or 1,061 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.62
- Overall: 1.05
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Did the Atlantean Secret Service get wind of a Manzo visit?

.....no we didn't get that memo......time to remove the main guns and double the number of ALL the AA weapons!!

Acctually when drawing the new layout I found I had quite abit of room to add additional heavy and medium AA, while the SS report showed little change.