WesWorld

The Colombian Riohatcha class are quickly becoming obsolete and will eventually need to be replaced

Here are some possible rebuild options to allow them to retain some usefullness.

Riohacha (ex U.S.S.Smith), Colombia (built in U.S.) destroyer laid down 1908

Displacement:
855 t light; 883 t standard; 1,099 t normal; 1,272 t full load

Dimensions: Length overall / water x beam x draught
294.50 ft / 293.10 ft x 26.40 ft x 11.00 ft (normal load)
89.76 m / 89.34 m x 8.05 m x 3.35 m

Armament:
5 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1908 Model
Breech loading guns in deck mounts
on centreline ends, majority forward
Weight of broadside 68 lbs / 31 kg
Shells per gun, main battery: 150
3 - 18.0" / 457.2 mm above water torpedoes

Machinery:
Coal fired boilers, steam turbines,
Direct drive, 3 shafts, 16,761 shp / 12,504 Kw = 28.15 kts
Range 2,400nm at 15.00 kts
Bunker at max displacement = 389 tons (100% coal)

Complement:
95 - 124

Cost:
£0.121 million / $0.484 million

Distribution of weights at normal displacement:
Armament: 8 tons, 0.8 %
Machinery: 600 tons, 54.6 %
Hull, fittings & equipment: 247 tons, 22.4 %
Fuel, ammunition & stores: 244 tons, 22.2 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
295 lbs / 134 Kg = 21.9 x 3.0 " / 76 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.72
Metacentric height 1.7 ft / 0.5 m
Roll period: 8.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.452
Length to Beam Ratio: 11.10 : 1
'Natural speed' for length: 17.12 kts
Power going to wave formation at top speed: 63 %
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: 16.00 ft / 4.88 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 9.00 ft / 2.74 m
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 9.00 ft / 2.74 m
- Average freeboard: 11.45 ft / 3.49 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 182.2 %
- Above water (accommodation/working, high = better): 84.6 %
Waterplane Area: 4,944 Square feet or 459 Square metres
Displacement factor (Displacement / loading): 57 %
Structure weight / hull surface area: 24 lbs/sq ft or 119 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 1.49
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
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Riohacha (ex U.S.S.Smith) DDE, Colombia (built in U.S.) destroyer escort laid down 1908 (Engine 1932)

Displacement:
954 t light; 994 t standard; 1,099 t normal; 1,183 t full load

Dimensions: Length overall / water x beam x draught
298.19 ft / 293.10 ft x 26.40 ft x 11.00 ft (normal load)
90.89 m / 89.34 m x 8.05 m x 3.35 m

Armament:
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1932 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
2 - 1.57" / 39.9 mm guns in single mounts, 1.93lbs / 0.88kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships
6 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 129 lbs / 58 kg
Shells per gun, main battery: 250
3 - 21.0" / 533.4 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 26,810 shp / 20,000 Kw = 31.43 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 189 tons

Complement:
95 - 124

Cost:
£0.124 million / $0.496 million

Distribution of weights at normal displacement:
Armament: 16 tons, 1.5 %
Machinery: 550 tons, 50.1 %
Hull, fittings & equipment: 347 tons, 31.6 %
Fuel, ammunition & stores: 146 tons, 13.2 %
Miscellaneous weights: 40 tons, 3.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
344 lbs / 156 Kg = 11.2 x 4.0 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.1 ft / 0.3 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 0.84

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.452
Length to Beam Ratio: 11.10 : 1
'Natural speed' for length: 17.12 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.00 ft / 5.79 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 9.00 ft / 2.74 m
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 9.00 ft / 2.74 m
- Average freeboard: 11.69 ft / 3.56 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 177.5 %
- Above water (accommodation/working, high = better): 77.1 %
Waterplane Area: 4,944 Square feet or 459 Square metres
Displacement factor (Displacement / loading): 63 %
Structure weight / hull surface area: 34 lbs/sq ft or 165 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.65
- Longitudinal: 2.20
- Overall: 0.74
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

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Riohacha (ex U.S.S.Smith) DDML, Colombia (built in U.S.) destroyer minelayer laid down 1908 (Engine 1932)

Displacement:
958 t light; 994 t standard; 1,099 t normal; 1,183 t full load

Dimensions: Length overall / water x beam x draught
294.67 ft / 293.10 ft x 26.40 ft x 11.00 ft (normal load)
89.82 m / 89.34 m x 8.05 m x 3.35 m

Armament:
3 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1932 Model
Dual purpose guns in deck mounts
on centreline ends, majority forward
2 - 1.57" / 39.9 mm guns in single mounts, 1.93lbs / 0.88kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 97 lbs / 44 kg
Shells per gun, main battery: 250

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 13,405 shp / 10,000 Kw = 26.68 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 189 tons

Complement:
95 - 124

Cost:
£0.099 million / $0.397 million

Distribution of weights at normal displacement:
Armament: 12 tons, 1.1 %
Machinery: 396 tons, 36.0 %
Hull, fittings & equipment: 510 tons, 46.4 %
Fuel, ammunition & stores: 141 tons, 12.8 %
Miscellaneous weights: 40 tons, 3.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
823 lbs / 373 Kg = 26.7 x 4.0 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 0.9 ft / 0.3 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.17
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.452
Length to Beam Ratio: 11.10 : 1
'Natural speed' for length: 17.12 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 57
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: 18.00 ft / 5.49 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 9.00 ft / 2.74 m
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 9.00 ft / 2.74 m
- Average freeboard: 11.61 ft / 3.54 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 129.8 %
- Above water (accommodation/working, high = better): 105.2 %
Waterplane Area: 4,944 Square feet or 459 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 50 lbs/sq ft or 244 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.07
- Longitudinal: 3.18
- Overall: 1.20
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
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Riohacha (ex U.S.S.Smith)DDMS, Colombia (built in U.S.) destroyer mine sweeper laid down 1908 (Engine 1932)

Displacement:
954 t light; 994 t standard; 1,099 t normal; 1,183 t full load

Dimensions: Length overall / water x beam x draught
298.19 ft / 293.10 ft x 26.40 ft x 11.00 ft (normal load)
90.89 m / 89.34 m x 8.05 m x 3.35 m

Armament:
4 - 3.95" / 100 mm guns in single mounts, 30.81lbs / 13.98kg shells, 1932 Model
Dual purpose guns in deck mounts
on centreline, evenly spread
Aft Main mounts separated by engine room
2 - 1.57" / 39.9 mm guns in single mounts, 1.93lbs / 0.88kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships
6 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 129 lbs / 58 kg
Shells per gun, main battery: 250

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 13,405 shp / 10,000 Kw = 26.68 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 189 tons

Complement:
95 - 124

Cost:
£0.102 million / $0.409 million

Distribution of weights at normal displacement:
Armament: 16 tons, 1.5 %
Machinery: 396 tons, 36.0 %
Hull, fittings & equipment: 492 tons, 44.7 %
Fuel, ammunition & stores: 146 tons, 13.2 %
Miscellaneous weights: 50 tons, 4.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
796 lbs / 361 Kg = 25.8 x 4.0 " / 100 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 0.9 ft / 0.3 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.452
Length to Beam Ratio: 11.10 : 1
'Natural speed' for length: 17.12 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19.00 ft / 5.79 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 9.00 ft / 2.74 m
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 9.00 ft / 2.74 m
- Average freeboard: 11.69 ft / 3.56 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 133.6 %
- Above water (accommodation/working, high = better): 105.2 %
Waterplane Area: 4,944 Square feet or 459 Square metres
Displacement factor (Displacement / loading): 113 %
Structure weight / hull surface area: 48 lbs/sq ft or 234 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.02
- Longitudinal: 3.06
- Overall: 1.14
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

I'd go with the DDE version with the faster speed, still enough misc weight of a few mines if rails fitted and good AA defences. Minesweeping could be done by a smaller vessel. (Enter sales pitch for my new Guardia Class minesweeper/escort).

I'm thinking one of these ships will be converted to a minelayer, leaving the other 4 to form a DesDiv, similar to Atlantean practice. I wouldn't mind having a look at those Guardia Class minesweeper/escorts.