While cruise ships are not comprehensive medical facilities, cruise lines understand that some people may have health needs during a cruise. Thus they are committed to providing first response and emergency care to guests until they can be transferred to a shoreside medical facility. Most cruise lines have 24-hour medical services and staff operating under guidelines developed in conjunction with the American College of Emergency Physicians (AECP). Cruise lines and travel agents encourage vacationers to obtain medical insurance, travel with adequate supplies of medical prescriptions and devices and to disclose pre-existing medical conditions before sailing.