# Ground rules {% hint style="danger" %} This site is for **SIMULATION USE ONLY**. {% endhint %} ## Frequency etiquette ### Don't step on other people's transmissions Before pressing your push to talk button, ensure no one is talking first. If a controller issues an instruction, 9 times out of 10 a readback or acknowledgement of some kind is required by the pilot. Refrain from interrupting (or cutting in front of) readbacks. ### Readback instructions ASAP Once issued an instruction, you should always provide a readback. For example: > **Tower:** GMB, taxi holding point runway 19 via N > > **GMB:** taxiing runway 19 via N, GMB. You do not need to readback the surface winds or weather conditions. ## Runways ### Don't stop on runways unless instructed Runways are very sensitive areas. There are strict rules on what can and cannot be done on a runway. One main rule is that only one aircraft may depart or land on a runway at once. If there is any other aircraft on the runway, aircraft **cannot land** and will be sent around for another approach. After landing, **always vacate as soon as possible**. It is assumed that you will do this unless otherwise instructed. **Do not stop on the runway after landing to wait for instructions.** ### Don't accept a takeoff clearance if you're not ready If you know you're going to need a couple minutes before departing, do not accept a takeoff clearance. Instead, let the controller know you need a few minutes. If issued an "immediate" takeoff clearance, you must decline if you will not be able to takeoff as soon as you've lined up on the runway's center line. Immediate takeoff clearances are only ever issued when there is barely enough time between departing traffic (you) and arriving traffic. ## Ground movements ### Squawk mode C (XPDR/ALT/C) when in motion When on a taxiway, apron or runway, or when airborne or requesting pushback, always squawk mode Charlie (sometimes called XPDR, ALT, C or XPDR TA/RA). ## Final guidance ### Controllers are volunteers All air traffic controllers on VATSIM are volunteers, meaning they dedicate their spare time to providing a service to you. ### Controllers are not mentors On VATSIM, there are many pilot training orginizations. Whilst some controllers may provide basic guidance and can answer general questions, you shouldn't rely on them entirely for information. If the controller is dealing with other aircraft, they are likely unable to answer your questions. If you are unsure of the local procedures, check Google! --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://iceland.olli.ovh/vatsim-basics/ground-rules.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.