--- sd_hide_title: true --- # Navigate ```{toctree} :hidden: tutorials/index reference_manual/index ``` ## Navigate **Navigate** is a sectoral integrated assessment model for the maritime industry's transition toward zero-carbon shipping. It projects how a fleet renews itself, which fuels and technologies it adopts, where those fuels are produced and bunkered, and how regulation reshapes those choices — year by year, over multi-decade horizons. Unlike a central-planner optimiser, Navigate represents long-term investment as a discrete-choice problem: shipowners weigh costs, regulation, and availability and pick among newbuild, retrofit, and fuel options through a multinomial logit model. Only short-term operational decisions, such as how a voyage is actually bunkered, are solved as a linear program. The result is a behavioural picture of the transition rather than a least-cost ideal. A simulation is described in a small domain-specific language: human-readable `.nav` and `.inc` files that declare nodes — vessels, fleets, routes, ports, fuels, plants, regulations — and a timeline of events that change them. Running a deck produces Excel reports and plots that trace fleet composition, fuel demand, emissions, and compliance costs through time. ## About this documentation This site is organised into two parts. New users should start with the tutorials and work through them in order; the reference manual is there to look up specifics as you build your own decks. ::::{grid} 1 1 2 2 :gutter: 3 :::{grid-item-card} Tutorials :link: tutorials/index :link-type: doc A guided path from installing Navigate and running your first single-vessel simulation through to modular, multi-scenario studies. ::: :::{grid-item-card} Reference Manual :link: reference_manual/index :link-type: doc The `.nav`/`.inc` DSL syntax and a complete description of every node type and its attributes, grouped by theme. ::: :::: Installation instructions and the full list of command-line options live in the project [README](https://github.com/zerocarbonshipping/navigate-zcs). ## Citing this Project If you use Navigate in your work, please cite us: > Lehn, F. W., Thomas, J. & Hintze, M. *Navigate* v1.0.0 (Fonden Mærsk > Mc-Kinney Møller Center for Zero Carbon Shipping, 2026); > https://github.com/zerocarbonshipping/navigate-zcs ::::{tab-set} :::{tab-item} BibTeX ```bibtex @software{Navigate-2026, author = {Lehn, Frederik Winkel and Thomas, Julius and Hintze, Mathias}, organization = {Fonden Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping}, license = {Apache-2.0}, month = jul, title = {{Navigate}}, url = {https://github.com/zerocarbonshipping/navigate-zcs}, version = {1.0.0}, year = {2026} } ``` ::: :::{tab-item} RIS ```text TY - COMP AU - Lehn, Frederik Winkel AU - Thomas, Julius AU - Hintze, Mathias TI - Navigate PB - Fonden Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping PY - 2026 ET - 1.0.0 UR - https://github.com/zerocarbonshipping/navigate-zcs ER - ``` ::: :::{tab-item} APA ```text Lehn, F. W., Thomas, J., & Hintze, M. (2026). Navigate (Version 1.0.0) [Computer software]. Fonden Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping. https://github.com/zerocarbonshipping/navigate-zcs ``` ::: :::{tab-item} MLA ```text Lehn, Frederik Winkel, et al. Navigate. Version 1.0.0, Fonden Mærsk Mc-Kinney Møller Center for Zero Carbon Shipping, 2026, github.com/zerocarbonshipping/navigate-zcs. ``` ::: ::::