Vancouver First Aid offers training and recertification in National Lifeguard Society (NLS) and Water Safety Instructor (WSI). NLS recerts include the nls core and pool option. A four hour precert can be taken prior tto the four hour recertification. The Water Safety Instructor recertification is a four hour recert with a combination of classroom and pool time. For more information or to register for a recertification course select a course from the menu bar or select from the following recertifications.