Port Berth + Apron + Wharf Designer

Size a marine berth for a design vessel. Enter the ship's LOA, beam and draft, the berth & basin rules, and the water-depth allowances — the app finds the berth-face length, the required water depth, the turning-basin diameter, a typical apron/wharf width for the cargo, and the fender/berthing energy, with a plan sketch of the vessel alongside.

⭐ Free to design · Balance … EP

① Design vessel

LOA — length overall (m)

Beam — moulded breadth (m)

Loaded draft (m)

Displacement (tonnes) — opt.

Use the design vessel — the largest ship the berth must accept. Displacement is only needed for the berthing-energy (fender) check in card ④.

② Berth & basin

Number of berths

Clearance per end (% of LOA)

Minimum clearance (m)

Turning-basin factor (× LOA)

Cargo type (sets apron-width range)

Clearance per end = max(min clearance, % × LOA). For a single berth, length = LOA + 2 × clearance; for several berths, each ship gets clearance on both sides.

③ Water depth

Under-keel clearance (% of draft)

Minimum UKC (m)

Tidal range (m) — opt.

UKC = max(min UKC, % × draft). The depth below water level = draft + UKC. If soundings are referenced to chart datum (LAT), add the tidal range to get the depth below datum.

④ Berthing energy — optional

Berthing velocity V (m/s)

Mass / added-mass coeff Cm

Eccentricity coeff Ce

Softness coeff Cs

Berthing (fender) energy E = ½·M·V²·Cm·Ce·Cs, with M the displacement (tonnes) from card ①. Computed only when a displacement is given.

⚓ Berth sizing

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Preliminary berth-face length

Berth length L

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Depth below water level

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Depth below datum

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Turning-basin diameter

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Apron width (typical)

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Berthing energy

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Design summary

Quantity	Symbol	Value

⚠️ Indicative apron/wharf widths — confirm against PIANC / port master-plan / cargo-handling layout. The ranges below are typical orders of magnitude only; the actual width depends on the gantry-crane rail gauge, back-reach, container stacking, road/rail and storage layout for your specific terminal.