VI. (a) Minenlegen (Mine Layers)

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VI. Minenbooten (Mine Warfare Vessels).
..(a) Minenlegen (Mine-layers).
.....SMS Nautilus
.....SMS Albatross
.....SMS Ziethen

(NOTE: Many vessels of other types are capable of laying mines as a secondary duty. See the misc. weight breakdowns of these ships for capacities.)

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Nautilus class

SMS Nautilus - laid down 1904, commissioned 1904 - SUNK by mine near Singapore 22 November 1907
SMS Albatross - laid down 1904, commissioned 1905 - CTL (grounding in Hobart Strait) October 1907



Brandenburgian Minendampfer laid down 1904 (Engine 1907)

Displacement:
   1,991 t light; 2,052 t standard; 2,311 t normal; 2,517 t full load

Dimensions: Length overall / water x beam x draught
   341.21 ft / 328.08 ft x 37.57 ft x 13.12 ft (normal load)
   104.00 m / 100.00 m x 11.45 m  x 4.00 m

Armament:
      8 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1900 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      2 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1902 Model
     Machine guns in deck mounts
     on side, all forward

   Weight of broadside 176 lbs / 80 kg
   Shells per gun, main battery: 150

Mines @ 1t each: 350

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:      0.79" / 20 mm         -               -

   - Armour deck: 0.79" / 20 mm

Machinery:
   Coal fired boilers, reciprocating cruising steam engines plus steam turbines,
   Direct drive, 3 shafts, 7,000 ihp / 5,222 Kw = 20.21 kts
   Range 5,000nm at 10.00 kts (Bunkerage = 465 tons)

Complement:
   166 - 216

Cost:
   £0.166 million / $0.662 million

Distribution of weights at normal displacement:
   Armament: 21 tons, 0.9 %
   Armour: 131 tons, 5.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 11 tons, 0.5 %
      - Armour Deck: 120 tons, 5.2 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 560 tons, 24.2 %
   Hull, fittings & equipment: 780 tons, 33.7 %
   Fuel, ammunition & stores: 319 tons, 13.8 %
   Miscellaneous weights: 500 tons, 21.6 %
     -350 t:  Mines
      -50 t:  Sehendes Auge
      -25 t:  Markoni installation
      -25 t:  Flag accomodations
      -50 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,515 lbs / 1,141 Kg = 121.0 x 3.5 " / 88 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.14
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.500
   Length to Beam Ratio: 8.73 : 1
   'Natural speed' for length: 18.11 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 36
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 13.12 ft / 4.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:         24.61 ft / 7.50 m
      - Forecastle (15 %):      21.33 ft / 6.50 m
      - Mid (25 %):      19.69 ft / 6.00 m (13.12 ft / 4.00 m aft of break)
      - Quarterdeck (15 %):   13.12 ft / 4.00 m
      - Stern:         13.12 ft / 4.00 m
      - Average freeboard:      15.29 ft / 4.66 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109.3 %
      - Above water (accommodation/working, high = better): 133.6 %
   Waterplane Area: 8,212 Square feet or 763 Square metres
   Displacement factor (Displacement / loading): 121 %
   Structure weight / hull surface area: 51 lbs/sq ft or 251 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.67
      - Overall: 1.00
   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

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Ziethen class

SMS Ziethen - laid down 1908



Brandenburgian Minendampfer laid down 1908 (Engine 1909)

Displacement:
   1,885 t light; 1,947 t standard; 2,311 t normal; 2,602 t full load

Dimensions: Length overall / water x beam x draught
   341.21 ft / 328.08 ft x 37.57 ft x 13.12 ft (normal load)
   104.00 m / 100.00 m x 11.45 m  x 4.00 m

Armament:
      8 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1900 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
      1 - 1.97" / 50.0 mm guns in single mounts, 3.86lbs / 1.75kg shells, 1903 Model
     Anti-airship gun in deck mount
     on centreline amidships
      2 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1908 Model
     Machine guns in deck mounts
     on side, all forward

   Weight of broadside 180 lbs / 82 kg
   Shells per gun, main battery: 150

   1 - 17.7" / 450 mm submerged torpedo tubes
   500 350-kg mines

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm      0.79" / 20 mm

   - Armour deck: 1.18" / 30 mm

Machinery:
   Coal and oil fired boilers, reciprocating cruising steam engines plus steam turbines,
   Direct drive, 3 shafts, 7,000 ihp / 5,222 Kw = 20.21 kts
   Range 7,500nm at 10.00 kts (Bunkerage = 655 tons) (95% coal)

Complement:
   166 - 216

Cost:
   £0.143 million / $0.572 million

Distribution of weights at normal displacement:
   Armament: 21 tons, 0.9 %
   Armour: 191 tons, 8.3 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 11 tons, 0.5 %
      - Armour Deck: 179 tons, 7.8 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 422 tons, 18.3 %
   Hull, fittings & equipment: 801 tons, 34.7 %
   Fuel, ammunition & stores: 425 tons, 18.4 %
   Miscellaneous weights: 450 tons, 19.5 %
      -345 tons, 500 350kg mines and rails
      - 50 tons, Sehendes Auge
      - 20 tons, Markoni room
      - 20 tons, Flag accomodations
      - 10 tons, climatisation
      - 5 tons, torpedoes, 5 per tube

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,320 lbs / 1,506 Kg = 159.6 x 3.5 " / 88 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 1.5 ft / 0.5 m
   Roll period: 13.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.23
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.500
   Length to Beam Ratio: 8.73 : 1
   'Natural speed' for length: 18.11 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 13.12 ft / 4.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.61 ft / 7.50 m
      - Forecastle (15 %):   21.33 ft / 6.50 m
      - Mid (25 %):      19.69 ft / 6.00 m (13.12 ft / 4.00 m aft of break)
      - Quarterdeck (15 %):   13.12 ft / 4.00 m
      - Stern:      13.12 ft / 4.00 m
      - Average freeboard:   15.29 ft / 4.66 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.7 %
      - Above water (accommodation/working, high = better): 133.6 %
   Waterplane Area: 8,212 Square feet or 763 Square metres
   Displacement factor (Displacement / loading): 140 %
   Structure weight / hull surface area: 53 lbs/sq ft or 258 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.70
      - Overall: 1.00
   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