Byzantine Empire 1923-1924...

[Jefgte]

Torpedoes on a monitor is unconventional, although the ship seems more like an escort cruiser than a conventional monitor as I think of them.

They are intended to operate in archipelagos, narrow seas and colonies as a replacement for old pre-dreadnoughts.
Their speed allows them to engage alongside the battle line.
The Panzerschiff (2T3) config is economical and a challenge for any enemy cruiser.

[Jefgte]

Most of Navies build now 1500t-2000t Destroyers.

In 1924, Byzantine Empire Navy reclassify Destroyers, Torpedo Boats & Torpedo Gun Boat.
206 (+18)

Destroyers are now 1000t minimum.
Fleet Destroyers.
56 (+8)

Destroyers under 1000t are reclassified as Torpedo Boats.
Made for short seas, archipelagos & harbors defense.
107 (+4)

Torpedo Gun Boat are under 1000t.
Made for colonial works & escorts.
43 (+6)

[Jefgte]

TEN3, Byzantine Empire Fleet Tender laid down 1924

Displacement:
   5 153 t light; 5 276 t standard; 5 600 t normal; 5 859 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (400,26 ft / 400,26 ft) x 59,06 ft x (15,08 / 15,63 ft)
   (122,00 m / 122,00 m) x 18,00 m  x (4,60 / 4,76 m)

Armament:
      2 - 4,72" / 120 mm 45,0 cal guns - 50,00lbs / 22,68kg shells, 150 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on centreline ends, evenly spread
      2 - 3,00" / 76,2 mm 45,0 cal guns - 12,50lbs / 5,67kg shells, 200 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on sides, forward deck aft
      Weight of broadside 125 lbs / 57 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 13 870 shp / 10 347 Kw = 21,00 kts
   Range 8 000nm at 10,00 kts
   Bunker at max displacement = 583 tons

Complement:
   323 - 420

Cost:
   £0,775 million / $3,100 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 0,4 %
      - Guns: 24 tons, 0,4 %
   Armour: 1 tons, 0,0 %
      - Armament: 1 tons, 0,0 %
   Machinery: 457 tons, 8,2 %
   Hull, fittings & equipment: 1 507 tons, 26,9 %
   Fuel, ammunition & stores: 447 tons, 8,0 %
   Miscellaneous weights: 3 163 tons, 56,5 %
      - Hull below water: 1 400 tons
      - Hull above water: 1 235 tons
      - On freeboard deck: 500 tons
      - Above deck: 28 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 869 lbs / 3 569 Kg = 149,3 x 4,7 " / 120 mm shells or 1,7 torpedoes
   Stability (Unstable if below 1.00): 1,26
   Metacentric height 3,5 ft / 1,1 m
   Roll period: 13,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 98 %
         - Recoil effect (Restricted arc if above 1.00): 0,01
   Seaboat quality  (Average = 1.00): 1,48

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,550 / 0,555
   Length to Beam Ratio: 6,78 : 1
   'Natural speed' for length: 20,01 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20,00 %,  19,69 ft / 6,00 m,  19,03 ft / 5,80 m
      - Forward deck:   30,00 %,  11,81 ft / 3,60 m,  11,81 ft / 3,60 m
      - Aft deck:   30,00 %,  11,81 ft / 3,60 m,  11,81 ft / 3,60 m
      - Quarter deck:   20,00 %,  15,75 ft / 4,80 m,  15,75 ft / 4,80 m
      - Average freeboard:      14,09 ft / 4,30 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79,4 %
      - Above water (accommodation/working, high = better): 114,7 %
   Waterplane Area: 16 496 Square feet or 1 533 Square metres
   Displacement factor (Displacement / loading): 135 %
   Structure weight / hull surface area: 67 lbs/sq ft or 327 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,23
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

misc weight: 2803t
25t for Marconi
3t for 1918 fire control
20t for additionnal ventilation
20t for 2 central cranes
800t for Materials, Foods...
1898t for fuel
400t ammunitions

[Kaiser Kirk]

In 1924, Byzantine Empire Navy reclassify Destroyers, Torpedo Boats & Torpedo Gun Boat.
206 (+18)

Interesting.
Parthia may eventually do something similar,
but probably would put the 'Destroyer' limit at 750t, as those vessels
still seem viable. Which may change by time we get there.

[Jefgte]

More mercantile Patrol Boat

P800, Byzantine Empire Patrol Boat laid down 1924

Displacement:
   800 t light; 823 t standard; 933 t normal; 1 020 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (259,19 ft / 259,19 ft) x 32,81 ft x (7,68 / 8,22 ft)
   (79,00 m / 79,00 m) x 10,00 m  x (2,34 / 2,51 m)

Armament:
      1 - 4,02" / 102 mm 45,0 cal gun - 33,00lbs / 14,97kg shells, 200 per gun
     Quick firing gun in deck mount, 1924 Model
     1 x Single mount on centreline, forward deck forward
      1 - 1,85" / 47,0 mm 50,0 cal gun - 3,35lbs / 1,52kg shells, 300 per gun
     Quick firing gun in deck mount, 1924 Model
     1 x Single mount on centreline, aft deck aft
      2 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1924 Model
     2 x Single mounts on sides, forward deck forward
      2 raised mounts
      Weight of broadside 36 lbs / 17 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,39" / 10 mm         -               -
   2nd:   0,39" / 10 mm         -               -

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 5 500 shp / 4 103 Kw = 21,28 kts
   Range 5 000nm at 12,00 kts
   Bunker at max displacement = 198 tons (25% coal)

Complement:
   83 - 109

Cost:
   £0,172 million / $0,690 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 0,7 %
      - Guns: 7 tons, 0,7 %
   Armour: 2 tons, 0,2 %
      - Armament: 2 tons, 0,2 %
   Machinery: 185 tons, 19,9 %
   Hull, fittings & equipment: 354 tons, 37,9 %
   Fuel, ammunition & stores: 133 tons, 14,2 %
   Miscellaneous weights: 252 tons, 27,0 %
      - On freeboard deck: 226 tons
      - Above deck: 26 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2 064 lbs / 936 Kg = 63,7 x 4,0 " / 102 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,07
   Metacentric height 1,1 ft / 0,3 m
   Roll period: 13,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,04
   Seaboat quality  (Average = 1.00): 1,16

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,500 / 0,511
   Length to Beam Ratio: 7,90 : 1
   'Natural speed' for length: 16,10 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20,00 %,  15,09 ft / 4,60 m,  12,14 ft / 3,70 m
      - Forward deck:   30,00 %,  12,14 ft / 3,70 m,  10,50 ft / 3,20 m
      - Aft deck:   30,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Quarter deck:   20,00 %,  10,50 ft / 3,20 m,  10,50 ft / 3,20 m
      - Average freeboard:      11,31 ft / 3,45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 67,7 %
      - Above water (accommodation/working, high = better): 141,4 %
   Waterplane Area: 5 666 Square feet or 526 Square metres
   Displacement factor (Displacement / loading): 145 %
   Structure weight / hull surface area: 41 lbs/sq ft or 202 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,93
      - Longitudinal: 1,82
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

misc weight: 68t
1t for fire control 1918
25t for Long Range Marconi
10t for additionnal ventilation
25t enhanced Hydrophonne
6t for 60 DC
205t reserved for new materials, troop transport
6t for 2 x TT x457

=>Mercantile rules
Total armament: 1.9%
800t x 0.25
Cost 0.2BP & 0.2$