The IHM Maintenance Plan software built for superyachts. Generate or upload your maintenance manual, keep Part I and the change log current, and compose a survey pack in one click — so your vessel is always survey-ready.
No credit card · Free during beta · Limited spaces
Vessels in scope of the Hong Kong Convention and EU SRR establish their IHM through an initial hazardous-materials survey. Most handle that. What follows is where it falls apart.
The IHM Maintenance Plan requires recording every material change throughout the vessel's operational life — not just at survey time. Most vessels manage this with a server folder and a spreadsheet that drifts further from reality every refit.
MANTIS is your IHM Maintenance Plan — the record that stays current between surveys.
Built for nothing else. No adjacent features, no bloat. Parts II and III are included as good practice — hideable per vessel where you don't track them.
Upload your existing IHM Maintenance Manual, or generate a vessel-specific one from your live data — Part I inventory, MD/SDoC archive, and change log composed into a single manual. Record the DP's sign-off to lock the version; regenerate at each audit.
Track every hazardous material. Build manually or import from your existing Excel IHM.
Index operational waste by MARPOL Annex. Attach evidence. Track ODS disposal.
Manage consumables. Version Safety Data Sheets. Table A/B flagged automatically.
ICIHM, EU Inventory, Statements of Compliance — with expiry alerts and full version history. Then compose a survey pack in one click, with your adopted Maintenance Plan as the lead document, organised the way a surveyor expects to read it.
Every material change with MD and SDoC references. A complete, immutable audit trail.
Chasing each vessel for IHM status before a class survey is a liability. MANTIS gives you a live IHM status view across your whole fleet — which vessels are up to date, which have outstanding items, which have supplier documents pending. When an auditor asks, the answer is one click away.
MANTIS organises your IHM records around the full regulatory framework, so they line up with what a surveyor expects to see — whoever surveys your vessel. No approval implied, no lock-in.
The six core maintenance activities, explained — certificate management, Part I/II/III workflows, change recording, and survey preparation. Based on MEPC.379(80), written by a working Chief Engineer.
Read online, save as PDF. No cost, no software required.
"We built MANTIS because we'd lived the problem."
Dylan Wentink — Founder, Navio Maritime OÜA working Chief Engineer with ten-plus years across refit, world cruising, and new build. MANTIS is built by Navio Maritime, a maritime software company for superyachts — by people who have chased SDoCs, filed MDs, and sat across from a surveyor with records that weren't ready, for the crews who do it next.
Every feature, every vessel, no credit card. We're hardening the product with our first cohort — beta users get grandfathered pricing for life when we move to paid.
Real captains, CEs, and DPAs hammering on a tool built for them. Join the cohort that shapes what gets built next.
Join the betaManaging a fleet? Contact us — fleets welcome in the beta →
The Hong Kong Convention gives existing ships until their first renewal survey on or after 26 June 2025 — and no later than 26 June 2030 — to hold an IHM certificate. Here is what that deadline means for superyacht owners and what to do now.
Read →Maintaining an IHM is meant to be owned by a named person, not left to chance. Here is what the IHM Designated Person does on a superyacht, and how the role works alongside the DPA, Captain and Chief Engineer.
Read →What the regulations require for superyachts — and how MANTIS helps you keep on top of it.