Standard Schedules Information Manual (SSIM)

What’s inside the SSIM?

• Chapter 2 – Information Required for Standard Schedules (Data Requirements, Data Representation, Data Elements and Data Element Identifiers)
• Chapter 3 – Standard Print Layouts for Schedules Information (Data Elements Required, Code Sharing Flights, Plan Change, Examples)
• Chapter 4 – Standard Schedules Message Procedure (Principles and Rules, Messaging Standards, Technical Message Specification)
• Chapter 5 – Ad hoc Schedules Message Procedure (Principles and Rules, Message Standards, Technical Specification, Technical Message Specification)
• Chapter 6 – Airport Coordination Procedures (Principles and Rules, Standard Procedures and Messages, Message Standards, Message Specifications)
• Chapter 7 – Presentation and Transfer of a Schedule Data Set (Principles for the Transfer of Computerized Schedules, Computerized Schedules Constraints, Application)
• Chapter 8 – Presentation, Application, and Transfer of Minimum Connecting Time (MCT) Data (Establishing MCTs, Practice for the Submission of MCTs, Application)
• Appendix A IATA Aircraft Types (Aircraft Type Codes, Aircraft Group Codes, ICAO Codes)
• Appendix B Meal Service Codes
• Appendix C Service Types
• Appendix D Passenger Terminal Indicators (Assignment Principles, List of Passenger Terminals)
• Appendix F UTC-Local Time Comparisons and ISO Two letter Country Codes (ISO country code, time Zone, Standard variation to UTC, Daylight Saving Time information)
• Appendix G Traffic Restriction Codes Table
• Appendix H Explanatory Notes on SSIM Applications
• Appendix I Region Codes (Region codes, IATA TC areas, ISO country codes)
• Appendix J Information Codes for Use in the Airport Coordination Process (Additional information Codes, Coordinator Reason Codes)
• Appendix K General Aviation Slot Clearance Request
• Attachment 3 MCT Coordinator Contacts

What’s new in the SSIM?

Every year, the SSIM is published to keep the industry up-to-date on the latest standardization in technique, format and conventions in airlines schedules data.

Effective March 1st, 2024, the 34th edition SSIM significant changes include:

• Chapter 2 -  Action Code ‘E’  removed.  New  Change Reason – ‘OTHR’ added. Clarification added for Data Elements: Leg Sequence Number, Scheduled Time of Passenger Arrival (Passenger STA) and Scheduled Time of Passenger Departure (Passenger STD)
• Chapter 6 -  Removal of ‘E’ and ‘Eliminate’ under Slot Clearance Request/Reply (SCR), Schedule Movement Advise/Reply (SMA) and Waitlist Change/Reply (WCR)
• Appendix A – New and revised Aircraft Type Codes. New aircraft category added - Drone.
• Appendix D – New and revised Passenger Terminal entries
• Appendix F – Daylight Saving Time information for 2024-2025 and 2026
• Appendix I– Croatia added to Schengen agreement countries
• Terminal Registration and Change Request form to be used for the submission of the Passenger Terminal amendments for inclusion in Appendix D is available in the eSSIM and on the plan standard board page
• Appendix A, D, F and I data TXT files available in Toolbox (eSSIM) 
• Watchlist for potential new aircrafts, airports and passenger terminals (eSSIM)