ICW - Inter coastal waaterway or in connection with

INFO - Information

IMDG - International Martime Dangerous Goods Code

IMO - International Maritime Organization

IFO - Intermediate fuel oil

INDIC - Indication

INCL - Including

INSP - Inspector

INCLOT - Including overtime

ILOHC - In lieu of hold cleaning

ICOT - Including overtime

INTN - Intention

INV - Invoice

IRO - In respect of

IU - If used

IUHTAUTC - If used, half time actually used to count

ITF - International Transport Workers Federation

IWL - Institute Warranty Limits