This section allows pilots to provide additional details or special instructions related to the flight. It’s a free-text field where various information may be entered depending on the specific circumstances of the flight. Some common items that pilots might include in this section are:

1. RVSM Approval: If the aircraft is approved for Reduced Vertical Separation Minimum (RVSM) operations, the relevant details may be specified here.
2. Datalink Communication: If the flight is equipped for and capable of datalink communication, the relevant information may be indicated in this section.
3. Emergency and Survival Equipment: Information related to emergency and survival equipment on board, such as the number of life jackets or survival kits, may be included.
4. Special Handling Requirements: If the flight requires special handling, such as medical emergencies or hazardous materials on board, this information can be entered in Item 18.
5. Additional Remarks: Any other relevant information or special considerations that may be important for air traffic control or other authorities.

Insert 0 ( zero ) if no other information, or, any other necessary information in the preferred sequence shown below, in the form of an appropriate indicator followed by an oblique stroke and the information to be recorded.

• ALTN/ destination alternate aerodrome if the letter group „ZZZZ“ is inserted in Item 16
• AWR/Rn Alternative flight plan on the basis of the Aircraft Operator „What-If“ Re-route Function (AOWIR), whereby „n“ designates the current number of the AOWIR alternative flight plan
• CODE/ Aircraft address (expressed in the form of an alphanumerical code of six hexadecimal characters) when required by the appropriate ATS authority
• COM/ indication of radio telephony equipment carried if letter „Z“ is indicated in Item 10
• DAT/ Data related to data link; followed by the letters S (for satellite), H (for HF), V (for VHF), and/or M (for SSR Mode S)
• DEP/ departure aerodrome if the letter group „ZZZZ“ is inserted in Item 13 or the point from which the flight plan is applicable, or the position from which supplementary flight plan data may be obtained if the letter group „AFIL“ is inserted in Item 13
• DEST/ destination aerodrome if the letter group „ZZZZ“ is inserted in Item 16, or the point to which the flight plan is applicable
• DOF/ Date of flight, given in the sequence year-month-day
• EET/ significant points, points with change of flight rules, indication of locations or FIR boundaries with accumulated estimated elapsed timeExample: EET/KONSTANZ0050
• MDCN/ Military Diplomatic Clearance Number; for military aircraft
• NAV/ indication about the radio navigation equipment carried if the letter „Z“ is indicated in Item 10
• OPR/ aircraft operator, if not obvious from the aircraft identification in Item 7 of the flight plan form
• PBN/ required when R equipment on board for description of RNAV equipment
• PER/ aircraft performance data (e.g. rate of climb)
• RALT/ name of enroute alternate aerodromes
• REG/ aircraft identification
• RFP/ Qn replacement flight plan (replacement, alternative flight plan), „n“ indicating the current number 1 – 9 of the replacement flight plan for the flight concerned
• RIF/ changes of routing to the changed destination aerodrome and/or changed destination aerodrome
• RMK/ any other remark significant for the handling of the flight by ATS
• RVR/ RWY visual range (in metres)
• SEL/ SELCAL Code
• TYP/ type of aircraft if the letter group „ZZZZ“ is inserted in Item 9
• STS/ Reasons for special handling:
  • STS/ATFM EXEMPT APPROVED
  • STS/EMER Flights engaged in emergency missions (*)
  • STS/EXM833 State aircraft, not equipped with 8.33 kHz channel spacing radio equipment prescribed for an area
  • STS/HEAD Flights with Heads of States
  • STS/HOSP Flights with sick or injured persons needing immediate medical assistance, including flights urgently required for life-saving medical care of sick or injured persons. This comprises both flights for the transport of transplants, stored blood and medicine and flights to be conducted to pick up a patient, transplants, stored blood or medicine at the destination place.
  • STS/HUM Flights operating for humanitarian reasons
  • STS/NIL Replaces all other STS/entries. Only to be used when reporting flight plan changes.
  • STS/NONRNAV State aircraft, not equipped with type RNP prescribed for a route segment, a routing and/or an area
  • STS/NONRVSM State aircraft without RVSM permission.
  • STS/PROTECTED Flights critical to safety, the flight plan of which is only to be made available to a limited circle of recipients.
  • STS/RNAVINOP For aircraft, the RNAV equipment of which is inoperable at short notice or no longer complies with the required minimum conditions
  • STS/SAR Flights engaged in Search and Rescue missions (*)
  • STS/STATE Government flights

(*) Leads to an automatic exemption from ATFM restrictions.

It’s important for pilots to provide accurate and pertinent information in this section to ensure that relevant parties have all the necessary details for the safe and efficient handling of the flight. The specifics may vary based on the nature of the flight, aircraft equipment, and any special requirements or conditions.