than by surface transport. As an example, the Downtown Manhattan Heliport in New York City provides scheduled service to John F. Kennedy International Airport, and is used to move wealthy persons and important goods quickly to destinations as far away as Maryland. Police departments use heliports as a base for police helicopters, and larger departments may have a dedicated large heliport facility dedicated such as the LAPD Hooper Heliport. Some skyscrapers feature rooftop heliports to serve the transport needs of executives or clients. Many of these rooftop sites also serve as Emergency Helicopter Landing Facilities (EHLF), in case emergency evacuation is needed. The U.S. Bank Tower in Los Angeles is an example. Helipads are common features at hospitals, where they serve to facilitate helicopter air ambulance and MEDEVACs for transferring patients into and out of hospital facilities. Some large trauma centers may have multiple helipads, while most small hospitals have just one. Helipads allow hospitals to accept patients flown in from remote accident sites, where there are no local hospitals or facilities capable of providing the level of emergency care required. The National EMS Pilots Association (NEMSPA) has published multiple white papers, surveys and safety recommendations for the enhancement of hospital helipad operations to improve patient safety. Heliport markings While heliports can be oriented in any direction, they will generally have very definitive approach and departure paths. However, heliports are not numbered in the same way that runways at airports are. Recommended standard practice by both the Federal Aviation Administration (FAA) and the International Civil Aviation Organization (ICAO) is to orient a H in the center of the TLOF, in line with the preferred approach / departure direction. An information box should also be included in the TLOF area, which provides the aircraft gross weight the helipad is rated for, as well as the maximum size helicopter the helipad has been designed to accommodated, which is based on the helicopter rotor diameter and overall length of the largest design helicopter that will service the helipad. Under normal conditions, it is standard practice to paint the maximum gross weight a helipad is designed to support in either metric tonnes, kilograms, or thousands of pounds, along with the maximum helicopter dimensions in metres or feet. Arrows are oftentimes painted on the heliport to indicate to pilots the preferred approach / departure paths. Other common markings can include ownership, radio frequencies, company logo(s),