Experience sharing, on their own

1. "Enemy ahead" can report the location of the enemy, but also can be used to report the location and measure the distance. For example: "Let's go to that house", then press "enemy ahead", or see the car, mark the location, while looking at the distance from the car.
2. Throwing grenades in situ can only throw up to 56 meters, jumping in situ to throw up to 66 meters, running to throw up to 75 meters. Usually see the enemy, when the distance is not sure, you can use "enemy ahead" to measure the distance, and then choose the appropriate way to throw grenades.
3. open the map, a large frame is 1000 meters, a small frame is 100 meters. Remember this, combined with the Pythagorean theorem, can usually be used to visually estimate the distance of the jump and transfer.