Compliance software built for LNG carriers, not adapted from generic maritime tools. Every regulation, every engine type, every containment system — modelled correctly the first time.
LNG carriers are 3-5% of the merchant fleet but 15% of the compliance complexity. Boil-off gas dynamics, engine-type methane slip, forced BOG vs GCU dispatch, containment-system age adjustment, dual-fuel operations — none of these are edge cases. They're the daily reality of running an LNG voyage.
Generic maritime compliance tools (ZeroNorth, OceanScore, Marorka, Signol, DNV Fleet Manager) built their engines for oil tankers first and bolted LNG on later. Their LNG factor is a single number. Their engine model has 2-3 types. Their BOG treatment is "assume it's fuel".
VEMO is the other way around. Built for LNG first. Every engine type gets its own SFOC curve + methane slip profile. Every containment gets its own BOR curve + age adjustment. Every voyage models natural BOG vs forced vs reliquefaction vs GCU per leg.
The things generic maritime software gets wrong on LNG.
ME-GI (2-stroke HP, minimal slip) vs X-DF (2-stroke Otto, moderate slip) vs DFDE (4-stroke, higher slip). FuelEU intensity varies 76-91 gCO₂e/MJ across these — the difference between A rating and D.
Moss vs NO96 vs Mark III vs Mark III Flex — each with age-adjusted BOR. Guarantee vs actual tracked per voyage with cargo-loss exposure in USD.
When natural boil-off < propulsion demand, the vaporizer runs at 15-25% inefficiency. Modelled per voyage leg with slow-steaming trade-off recommendations.
Dual-fuel engines need MGO pilot injection (~1-3% of fuel by mass). Small numbers but exclusion changes CII rating for close cases.
MEPC.350(78) has a separate formula for LNG carriers ≥100k DWT (inverted DWT exponent). Generic tools use the wrong one and get EEXI wrong by 20-40%.
Cargo quantity determined by GIIGNL protocols. VEMO uses actual GIIGNL energy accounting for MRV + DCS submission, not simplified mass approximations.
Guided wizard walks through vessel specs, engine setup, containment, charter terms. Then upload noon reports for the last 12 months and the whole fleet backfills automatically. Free 30-day trial.
Start Free →