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The small funnel follows the tug identified in the source as MSC Anie.

MCS Ailsa’s larger funnel accommodates a panel. Its top contains the logo and black wording below, but the details are unclear: the logo may be wholly black or partly blue. A narrow orange funnel top matches the bridge edging.

MCS Marlene differs in having a black funnel top and a lower panel.

MCS Maestro has no funnel: the illustration is a superstructure logo, seen on both sides and also at the aft end of the superstructure.