The Land Sea Orion Dye Marker fills an important need when it comes to the aspect of survival signaling. This signal dye sea marker is a perfect supplement instead of a signal mirror. This 3.2 ounce Orion Dye Marker is useful on both land,sea, and can even be utilized to write on the snow and ground as it is able to create a powerful luminescent green light that spreads up to an area of approximately 50 feet. A signaling dye marker is a perfect addition to your signal kit and also as an individual signal that can be affixed to PFDs and used on PWC's.When The Orion Survival Dye Marker first arrives, it comes in a 1 oz container with a lanyard. It is important to utilize this container always as it is durable which in turn will make it easy to locate if there is some sort of emergency. We can assure you that even many experts have concluded that this product is environmentally safe but also agree that multiple forms of signaling greatly increase one's odds of rescue which is why they believe survival Dye Marker will fill your needs.