Dartford Crossing charges, exemptions and penalties. You must pay if you use the Dartford Crossing between 6am and 10pm. You must pay by midnight on the day after you cross. The payment service is called Dart Charge. You no longer pay at the barriers when you use the Dartford Crossing.artford Crossing charges, exemptions and penalties. You must pay if you use the Dartford Crossing between 6am and 10pm. You must pay by midnight on the day after you cross. The payment service is called Dart Charge. You no longer pay at the barriers when you use the Dartford Crossing.
Messages: 10,314. FPO most definitely stands for Fleet Post Office, they mostly service Navy and Marine personnel, however there are times when FPO's service Air Force and Army. APO stands for Army or Air Force Post Office. The same is true as above, however they ocassionally service Navy and Marine personnel.
Military addresses must show the grade, full name with middle name or initial, and PSC number, unit number, or ship name. Replace the city name with APO  or FPO, and the state with AA, AE, or AP, and use a special ZIP Code. All APO / FPO shipments must be made by using the United States Post Office (USPS). Please note that some items cannot be shipped by APO / FPO.