Capacité de port d'un navire marchand ?

Comment déterminer la capacité d'un navire marchand dans ces possibilité de transport?
Voici le problème pour un navire charbonnier/ravitailleur de la Flotte de 1896
120m et 5000t lège

coal: 8000t
Amunition: 800t
Materials: 800t
Food: 960t

Quels sont ses réelles capacités de transport ?

Diego Suarez-Djibouti, France Supply vessel laid down 1896

Displacement:
5 000 t light; 5 194 t standard; 9 638 t normal; 13 194 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.00 ft / 393.00 ft) x 59.05 ft x (22.36 / 29.46 ft)
(119.79 m / 119.79 m) x 18.00 m x (6.82 / 8.98 m)

Armament:
2 - 1.85" / 47.0 mm 45.0 cal guns - 3.19lbs / 1.45kg shells, 250 per gun
Breech loading guns in deck and hoist mounts, 1896 Model
2 x Single mounts on sides, forward deck aft
2 - 0.31" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 500 per gun
Machine guns in deck mounts, 1896 Model
2 x Single mounts on sides forward
2 raised mounts
Weight of broadside 6 lbs / 3 kg

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 2 400 ihp / 1 790 Kw = 11.83 kts
Range 32 285nm at 10.00 kts
Bunker at max displacement = 8 000 tons (100% coal)

Complement:
486 - 632

Cost:
£0.237 million / $0.950 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.0 %
- Guns: 2 tons, 0.0 %
Machinery: 440 tons, 4.6 %
Hull, fittings & equipment: 1 998 tons, 20.7 %
Fuel, ammunition & stores: 4 638 tons, 48.1 %
Miscellaneous weights: 2 560 tons, 26.6 %
- Hull below water: 800 tons
- Hull above water: 960 tons
- On freeboard deck: 800 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
27 427 lbs / 12 441 Kg = 8 663.6 x 1.9 " / 47 mm shells or 4.8 torpedoes
Stability (Unstable if below 1.00): 1.53
Metacentric height 4.7 ft / 1.4 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 95 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.90

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck ,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.650 / 0.675
Length to Beam Ratio: 6.66 : 1
'Natural speed' for length: 19.82 kts
Power going to wave formation at top speed: 26 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 15.00 %, 17.72 ft / 5.40 m, 16.72 ft / 5.10 m
- Forward deck: 35.00 %, 12.80 ft / 3.90 m, 12.80 ft / 3.90 m
- Aft deck: 35.00 %, 12.80 ft / 3.90 m, 12.80 ft / 3.90 m
- Quarter deck: 15.00 %, 16.72 ft / 5.10 m, 16.72 ft / 5.10 m
- Average freeboard: 14.04 ft / 4.28 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 36.2 %
- Above water (accommodation/working, high = better): 87.9 %
Waterplane Area: 17 529 Square feet or 1 628 Square metres
Displacement factor (Displacement / loading): 280 %
Structure weight / hull surface area: 76 lbs/sq ft or 373 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.45
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

coal: 8000t
Amunition: 800t
Materials: 800t
Food: 960t

LD in 1897: Saigon & Kwan Tchéou

je ne comprend pas le rapport entre la question et toutes les données fournies

le navire fait 5000t à vide, pour 120m de long et 18m de large.
Comment évaluer sa charge maximale de port en lourd ?

6000t - 8000t - 10000t - 12000t - 16000t - 20000t ?

ca doit surement dépendre du volume qu'il déplace