SEEMP Emission Planner

Overview

Develop Ship Energy Efficiency Management Plans (SEEMP) compliant with IMO MARPOL Annex VI. Covers fuel consumption data collection, CO2 emissions tracking, CII carbon intensity planning, and NOx tier validation for Emission Control Areas.

The skill addresses the three mandatory SEEMP parts per IMO Resolution MEPC.346(78):

• Part I — Energy efficiency management plan (all ships): measures, monitoring, goals
• Part II — Fuel oil consumption data collection plan (ships ≥ 5,000 GT): DCS methodology, quality assurance, reporting chain
• Part III — Operational Carbon Intensity Plan (ships ≥ 5,000 GT): CII calculation, three-year improvement plan, corrective actions

It includes an automated NOx Tier Validator that checks engine specifications against IMO Regulation 13 Tier I/II/III limits for global operation and specific Emission Control Areas.

Getting Started

Add your ship’s technical documentation to the project workspace (engine specifications, fuel consumption records, EIAPP certificates, prior SEEMP if available), then activate the SEEMP Emission Planner skill. The agent will guide you through the process step by step — from ship identification through final document generation.

Example Conversation

A typical workflow for a bulk carrier that needs a SEEMP with NOx validation for European ECAs. The agent collects vessel data, builds the plan, and validates engine compliance.

You: I need to develop a SEEMP for our bulk carrier MV Nordic Horizon (IMO 9876543). She’s 82,000 DWT, built in 2019, and operates primarily in the North Sea and Baltic. The engine specs are in docs/engine_specs.md.

Agent: I’ll develop the complete SEEMP for MV Nordic Horizon. Since the vessel is 82,000 DWT (well above the 5,000 GT threshold), all three SEEMP parts are required. Let me confirm a few details:

1. What is the exact keel-laid date? (This determines the applicable NOx tier.)
2. What is the flag state and classification society?
3. Do you have last year’s fuel consumption data for baseline calculations?

Meanwhile, I’ve read the engine specifications — the vessel has two main engines (MAN B&W 6S60ME-C, 720 rpm, 11,275 kW each) and three auxiliary generators (MAN 6L23/30A, 900 rpm, 960 kW each). All five engines are > 130 kW, so Regulation 13 NOx limits apply to each.

You: Keel laid 15 March 2019. Flag: Marshall Islands. Class: DNV. Last year’s consumption: 8,420 t HFO, 310 t MGO. Total distance 47,200 nm.

Agent: With a keel-laid date of 2019-03-15, the global tier is Tier II (post-2011). Since the vessel was built after 1 Jan 2021’s Baltic NECA threshold — wait, the keel was laid in 2019, which is before the 1 Jan 2021 threshold for the Baltic Sea NECA. So Tier III is not required in the Baltic. However, let me check all your operating ECAs:

• North Sea NECA: Tier III threshold is keel laid on/after 1 Jan 2021 → your vessel (2019) does NOT require Tier III. Tier II applies.
• Baltic Sea NECA: Same threshold → Tier II applies.

I’ve run the nox_tier_validator on your engine specs. All five engines pass Tier II limits. No Tier III compliance is required for your operating areas.

Now let me calculate your CII baseline. With 8,420 t HFO (CF = 3.114) and 310 t MGO (CF = 3.206):

• Total CO2: (8,420 × 3.114) + (310 × 3.206) = 27,213.7 t CO2
• Transport work (AER): 82,000 DWT × 47,200 nm = 3,870,400,000 DWT·nm
• Attained CII = 7.03 g CO2 / (DWT·nm)

For 2026, the required CII uses a reduction factor Z = 11.0%. Your current rating is C (Moderate). I’ll build the three-year improvement plan targeting a B rating by 2028. Shall I proceed with the full document?

You: Yes, complete the SEEMP. Use flow meters as the primary fuel measurement method.

Agent: Done. I’ve generated the complete SEEMP at output/seemp.md with all three parts filled in:

• Part I: 6 energy efficiency measures (hull cleaning every 12 months, weather routing, trim optimization, waste heat recovery study, shore power in DNV-qualified ports, speed optimization on ballast legs). Monitoring via onboard flow meters and fleet performance system.
• Part II: Flow meter method as primary, BDN cross-check as secondary. Monthly data collection by Chief Engineer, quarterly verification by DPA, annual submission to flag state.
• Part III: CII improvement plan targeting B rating by 2028 — propeller polishing (−2.1% CII), hull coating renewal (−3.5% CII), and 0.5 knot average speed reduction on laden voyages (−4.2% CII).
• Appendix B: NOx compliance summary — all 5 engines PASS at Tier II.

The validation found 4 remaining placeholders (EIAPP certificate numbers for the 3 auxiliary engines and the IEE certificate number). Please provide those to finalize.

Sample Output Excerpt

A representative excerpt from the CII planning section (Part III) and the NOx compliance appendix of a generated SEEMP — the sections most scrutinized during port-state inspections.

Part III — Required Annual Operational CII

Ship type category: Bulk carrier | Metric: AER | Capacity: 82,000 DWT

Three-Year Implementation Plan

2026 Measures

2027 Measures

Appendix B — NOx Compliance Summary

This excerpt is illustrative. Final content must reflect the vessel’s actual operational data, engine certificates, and flag-state requirements.

Built-in Validation Tool

The skill includes the nox_tier_validator extension tool that automates NOx compliance checking against IMO MARPOL Annex VI Regulation 13.

What the tool checks

Severity levels

• ERROR — Engine exceeds the applicable NOx limit, or critical data is missing (no keel date, no engines found).
• WARNING — Missing measured NOx value for an engine, or an unrecognized ECA name.
• INFO — Tier determination details, ECA applicability results, and compliant engine confirmations.

Example validation output

======================================================================
IMO NOx TIER VALIDATION REPORT
======================================================================
Document: output/seemp.md
Keel-laid date: 2019-03-15
Global tier: Tier II
Engines found: 5
Target ECAs: North Sea NECA, Baltic Sea NECA
Tier III ECAs: None

--- ENGINE VALIDATION ---
  Engine: ME-01 (line 142)
    Rated speed: 720 rpm
    Power: 11,275 kW
    Global Tier II limit: 9.72 g/kWh
    Measured NOx: 8.6 g/kWh
    Global compliance: PASS

  Engine: AE-01 (line 144)
    Rated speed: 900 rpm
    Power: 960 kW
    Global Tier II limit: 9.18 g/kWh
    Measured NOx: 7.9 g/kWh
    Global compliance: PASS

  [... 3 more engines omitted for brevity ...]

--- SUMMARY ---
  Errors:   0
  Warnings: 0
  Info:     12

RESULT: COMPLIANT — all engines meet applicable NOx tier limits.
======================================================================

The agent runs the validator iteratively — once during engine data collection (Phase 5) to catch issues early, and again on the final document to populate Appendix B with verified compliance data.