## What is SMB in Scuba Diving?
SMB stands for Surface Marker Buoy. It is a device used by scuba divers to mark their location on the surface of the water. SMBs are typically bright orange or yellow, and they inflate to create a large, visible float.
SMBs are used for a variety of purposes, including:
Marking the dive site. Divers can deploy an SMB to mark the dive site, making it easier to find the boat on the surface.
Signaling for help. Divers can use an SMB to signal for help if they are lost or in distress.
Communicating with the surface. Divers can use an SMB to communicate with the surface team, for example, to request assistance or to provide an update on their dive.
SMBs are an essential piece of safety equipment for scuba divers. They are relatively inexpensive, and they can be easily deployed in an emergency.
### How to Use an SMB
Using an SMB is relatively simple. To deploy an SMB, follow these steps:
1. Inflate the SMB. Most SMBs are inflated by mouth. To inflate the SMB, simply open the valve and blow into the tube.
2. Attach the SMB to your BCD. Once the SMB is inflated, attach it to your BCD using the clip or lanyard that is provided.
3. Deploy the SMB. To deploy the SMB, simply throw it overboard. The SMB will float to the surface and mark your location.
If you need to signal for help using an SMB, follow these steps:
1. Inflate the SMB.
2. Attach the SMB to your BCD.
3. Wave the SMB over your head.
4. Sound the whistle or horn that is attached to the SMB.
### Types of SMBs
There are two main types of SMBs:
Disposable SMBs. Disposable SMBs are made of a thin, lightweight material that is designed to be used once and then discarded. Disposable SMBs are typically less expensive than reusable SMBs, but they are not as durable.
Reusable SMBs. Reusable SMBs are made of a more durable material that can be used multiple times. Reusable SMBs are typically more expensive than disposable SMBs, but they are more durable and can be used in a variety of conditions.
### Choosing an SMB
When choosing an SMB, consider the following factors:
Size. SMBs come in a variety of sizes. The size of the SMB that you need will depend on the depth of the water that you will be diving in.
Material. SMBs are made of a variety of materials, including nylon, PVC, and polyurethane. The material of the SMB that you choose will affect its durability and cost.
Features. Some SMBs come with additional features, such as whistles, horns, and lights. These features can be useful for signaling for help or communicating with the surface team.
SMB is an important piece of equipment for scuba divers. By understanding how to use an SMB, you can improve your safety and enjoy your dives more.