STS / Ice / Emergency

Reporting Ship-to-Ship operations, ice navigation, refuge port calls, and SAR/piracy periods.

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Overview

Correct reporting of STS operations, ice navigation and emergency periods is required for the shore system to apply the appropriate CII correction factors. Missing or incorrect flags forfeit the allowance.

Regulatory Background

Corrections defined in MEPC.355(78):

Parameter	What it covers
FC_voyage,j	Mass (g) of fuel type j consumed during voyage periods deductible when encountering MARPOL Annex VI Reg. 3.1 scenarios (safety emergencies) or sailing in ice conditions
AF_Tanker	Correction factor for tankers engaged in STS voyages — applicable to all fuel consumed in relation to the STS voyage including cargo transfer, transit, waiting at anchor or drifting, and port discharge after the STS voyage

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STS Operations

A tanker engaged in an STS operation is eligible to apply a CII allowance to CO₂ emitted before, during, and after the STS operation.

How to Flag an STS Period

The STS Operation field in the VOYAGE section is used to flag the STS period. Set it to Yes only when the vessel is actively performing STS operations during the report period.

Report type	Where to set the flag
In-Port Noon Report	VOYAGE section → STS Operation = Yes
Departure Report	VOYAGE section → STS Operation = Yes

During STS operations underway, report the distance moved even if the vessel’s Main Engine is not in use.

STS Flowchart

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Ice Navigation

Valid only for vessels holding an Ice Class notation. Do not use ice navigation flags on non-ice-classed vessels.

The CII allowance for “Time in Ice” applies when an ice-classed vessel is sailing in a sea area within the ice edge. The ice edge is defined by WMO Sea-Ice Nomenclature (March 2014) as the demarcation between open sea and sea ice of any kind (fast or drifting).

Ice charts or ice notices related to the relevant voyage periods must be retained and attached to the Metaweave report submission, or emailed separately to the Performance mailbox. The verifier may request them.

Reporting Ice Navigation by Report Type

In-Port Noon, Arrival, and Departure Reports

Use the Within Ice Edge field at the top of the VOYAGE section to flag the period in ice.

The NAVIGATING IN ICE event must not be used in In-Port Noon, Arrival, or Departure reports. Use the Within Ice Edge flag instead.

At-Sea Noon Report

Create a NAVIGATING IN ICE event. The event must record:

• Start and end time of the ice navigation period
• Distance covered during the period
• Fuel consumption during the period

Ice Navigation Flowchart

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Emergencies

CII adjustment is available for emergency scenarios specified in MARPOL Annex VI Regulation 3.1 that may endanger safe navigation. All emergency periods must be supported by appropriate deck Logbook entries.

There are two event types for emergency periods:

Event Type	Use for
NAVIGATING TO REFUGE PORT	Seeking shelter from weather; deviation to refuge port due to engine failure or vessel damage; deviation to evacuate a sick or injured crew member
SAR/PIRACY	Navigating at higher speed through piracy areas; Search and Rescue operations

Reporting Emergencies by Report Type

At-Sea Noon Report

Use the appropriate event type (NAVIGATING TO REFUGE PORT or SAR/PIRACY) directly in the At-Sea Noon report.

In-Port Noon, Arrival, and Departure Reports

Use the Refuge Port Call field at the top of the VOYAGE section to flag an emergency period at port (e.g. a forced diversion into a refuge port).

The NAVIGATING TO REFUGE PORT and SAR/PIRACY events must not be used in In-Port Noon, Arrival, or Departure reports. Use the Refuge Port Call flag instead.

Emergency Decision Flowchart