The Marine OS blog
Field notes for modern marinas
Operations playbooks, compliance deep-dives, and industry research — for the people who run marinas.
EU ETS for Shipping in 2026: What a Voyage Actually Costs
The EU ETS reached 100% phase-in in 2026 and now covers CH₄ and N₂O. Here is how allowance cost is actually calculated per voyage — with a worked deep-sea example and the scope rules that decide it.
FuelEU Maritime Penalty: How It Is Calculated, With a Worked Example
FuelEU Maritime fines ships whose energy is dirtier than the GHG-intensity target — €2,400 per tonne of VLSFO-equivalent deficit. Here is the formula, a worked voyage example, and the ways desks manage the exposure.
Who Pays the EU ETS — Owner or Charterer? Charter Clauses, Explained
The ETS compliance obligation sits with the shipping company, but the money usually moves. How BIMCO-style clauses allocate allowance costs under time and voyage charters, and what each side should check before fixing.
CII Rating Explained: The Formula, the 2026 Bands, and How a Voyage Moves It
How the IMO Carbon Intensity Indicator actually works: the AER formula, reference lines, the tightening reduction factor, what A–E ratings mean commercially, and how to estimate a voyage's CII impact before fixing.
FishingBooker Commission: The Real Math for Charter Captains (2026)
What FishingBooker and charter marketplaces actually cost per season: commission rates, when the fee is worth paying, when it is not, and how captains keep repeat business commission-free.
SEFHIER Electronic Reporting: A Plain Guide for Charter Captains (2026)
What SEFHIER requires from federally permitted charter and headboat captains: who must report, what goes in an electronic trip report, deadlines, approved apps, and the Gulf reinstatement status.
Spray Drone Record Keeping: What Part 137 Operators Must Log (2026)
The records agricultural spray-drone operators are required to keep: FAA Part 137 obligations, state pesticide application records, the weather fields that matter in a drift dispute, and how long to keep everything.
Pesticide Drift Liability for Drone Operators: The Records That Protect You (2026)
How drift claims against spray-drone applicators actually work: the legal theories, the evidence courts weigh, why wind records decide outcomes, and the defense file every operator should build per job.
Bridge & Lock Opening Times in the Netherlands: Planning a Canal Route Around Them (2026)
Dutch canal trips are timed by bridges and locks, not distance: fixed clearances, bedientijden (operating hours), seasonal schedules, and how to plan a route that arrives when the bridge actually opens.
How to Plan a Boat Trip with Multiple Stops (2026 Guide)
Planning a boat trip with several stops - fuel dock, anchorage, waterfront restaurant, home - is an ordering problem. How stop order changes total distance, how to sequence stops the smart way, and tools that do it automatically.
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