WesWorld

Emden amd her sister ship are expected to go into drydock in 1934 for a life-extension refit. The changes are quite minor: the three single 88mm/45 AA weapons are replaced with two twin 88mm/72 DP mounts, the older 20mm mountings are removed and replaced with 37mm mounts, and the 500mm torpedo tubes are replaced by 533mm tubes. Mine rails are also being installed. The boilers are being cleaned but not replaced.


Emden - refit, German Light Cruiser laid down 1921

Displacement:
5,336 t light; 5,539 t standard; 5,982 t normal; 6,336 t full load

Dimensions: Length overall / water x beam x draught
511.20 ft / 509.19 ft x 46.92 ft x 17.39 ft (normal load)
155.81 m / 155.20 m x 14.30 m x 5.30 m

Armament:
4 - 5.91" / 150 mm guns in single mounts, 99.87lbs / 45.30kg shells, 1921 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 5.91" / 150 mm guns in single mounts, 99.87lbs / 45.30kg shells, 1921 Model
Breech loading guns in deck mounts with hoists
on side ends, evenly spread
4 - 3.46" / 88.0 mm guns (2x2 guns), 20.79lbs / 9.43kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 901 lbs / 409 kg
Shells per gun, main battery: 150
4 - 21.0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.46" / 88 mm 360.89 ft / 110.00 m 8.23 ft / 2.51 m
Ends: Unarmoured
Main Belt covers 109 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm - -
2nd: 1.97" / 50 mm - -
3rd: 0.79" / 20 mm - -
4th: 0.79" / 20 mm - -

- Armour deck: 1.97" / 50 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 45,549 shp / 33,980 Kw = 29.33 kts
Range 6,800nm at 12.00 kts
Bunker at max displacement = 797 tons

Complement:
339 - 442

Cost:
£1.282 million / $5.127 million

Distribution of weights at normal displacement:
Armament: 116 tons, 1.9 %
Armour: 1,078 tons, 18.0 %
- Belts: 420 tons, 7.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 61 tons, 1.0 %
- Armour Deck: 582 tons, 9.7 %
- Conning Tower: 14 tons, 0.2 %
Machinery: 1,568 tons, 26.2 %
Hull, fittings & equipment: 2,094 tons, 35.0 %
Fuel, ammunition & stores: 646 tons, 10.8 %
Miscellaneous weights: 480 tons, 8.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,515 lbs / 2,501 Kg = 53.6 x 5.9 " / 150 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 1.8 ft / 0.6 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.53
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.504
Length to Beam Ratio: 10.85 : 1
'Natural speed' for length: 22.57 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.97 ft / 7.00 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (35 %): 15.58 ft / 4.75 m
- Quarterdeck (15 %): 14.76 ft / 4.50 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 16.65 ft / 5.07 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.0 %
- Above water (accommodation/working, high = better): 125.0 %
Waterplane Area: 15,975 Square feet or 1,484 Square metres
Displacement factor (Displacement / loading): 106 %
Structure weight / hull surface area: 77 lbs/sq ft or 375 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.32
- Overall: 0.96
Caution: Hull subject to strain in open-sea
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
Good seaboat, rides out heavy weather easily

Fitted with mine rails and capable of carrying up to 400 tons of mines

40 tons reserved for future growth

Sounds quite realistic to me.

How many mines can be carried with 400ts misc weight?

I'm assuming about 1 ton per mine, for most anti-shipping mines. That includes charge, anchor, cable, etc.