The ALS for the BLS Provider Field Guide is a tool that allows first responders and EMT-Basics to provide quality assistance to their advanced life support (ALS) counterparts. In many instances, basic life support (BLS) providers are left watching the action while ALS providers work. This handy guide is a ready review of the most critical skills that BLS providers may be asked to assist with in the field - and will help them become more useful on scene.