So Miketr got me thinking

[Sachmle]

Made to support 1 GTB Flotilla, which includes 2 CL and 6GTB (Max size GTB Flotilla in service is 16,950t, ship supports 17,000t)

Altmark, Deutsche Reich Flotilla Tender laid down 1921

Displacement:
   4,000 t light; 4,125 t standard; 6,053 t normal; 7,596 t full load

Dimensions: Length overall / water x beam x draught
   332.85 ft / 319.88 ft x 53.31 ft x 17.78 ft (normal load)
   101.45 m / 97.50 m x 16.25 m  x 5.42 m

Armament:
      1 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1921 Model
     Quick firing gun in deck mount
     on centreline aft, 1 raised gun
      2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1921 Model
     Anti-aircraft guns in deck mounts
     on side, all aft, all raised mounts - superfiring
      4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1921 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 39 lbs / 18 kg
   Shells per gun, main battery: 150

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 10,000 shp / 7,460 Kw = 18.42 kts
   Range 17,000nm at 15.00 kts
   Bunker at max displacement = 3,471 tons

Complement:
   343 - 446

Cost:
   £0.489 million / $1.958 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 0.1 %
   Armour: 2 tons, 0.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 344 tons, 5.7 %
   Hull, fittings & equipment: 1,474 tons, 24.3 %
   Fuel, ammunition & stores: 2,053 tons, 33.9 %
   Miscellaneous weights: 2,175 tons, 35.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,212 lbs / 5,539 Kg = 345.8 x 4.1 " / 105 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.699
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 17.89 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.50 degrees
   Stern overhang: 5.61 ft / 1.71 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19.69 ft / 6.00 m
      - Forecastle (20 %):   19.69 ft / 6.00 m
      - Mid (50 %):      19.69 ft / 6.00 m
      - Quarterdeck (20 %):   19.69 ft / 6.00 m
      - Stern:      19.69 ft / 6.00 m
      - Average freeboard:   19.69 ft / 6.00 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 59.1 %
      - Above water (accommodation/working, high = better): 149.2 %
   Waterplane Area: 13,652 Square feet or 1,268 Square metres
   Displacement factor (Displacement / loading): 208 %
   Structure weight / hull surface area: 67 lbs/sq ft or 328 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 3.17
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   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

2125t misc weight + 2125t Bunkerage = (4250 x 4) 17000t of shipping can support
1346t bunkerage = actual range of 6,425nm @ 15kts
25t Long Range Wireless
25t Sehendes Auge

[Borys]

Ahoj!
1 - IMHO there should be one CL per 10-12 GTBs.
2 - call it the Neu* Altmark - this will sound funny :) - the New Old March


* - and now I will have a German speaker chasing me with a tyre changing iron 'cause it should be Neue or Neues or Neuer or something like that ... :D

Borys