The short answer
HSI’s current AVIRT course overview lists a course length of approximately two to three hours and a blended format with an instructor-led skills session. Arrow’s public page does not publish a current duration, so Arrow should confirm whether its delivery follows that standard, includes online preparation, or adds site-specific exercises that change the schedule.
What to know
Course length should be evaluated against content, not convenience alone. A meaningful program needs time for situational awareness, response options, emergency communications, bleeding-control instruction, hands-on practice, questions, and an explanation of the organization’s own plan. Larger groups, accessibility needs, multiple scenarios, facility walkthroughs, or additional emergency-planning work may require more time or separate sessions.
Before enrolling, ask for the agenda, online requirements, in-person start and end times, physical activities, breaks, instructor-to-student ratio, equipment practice, completion standard, and certification period. Organizations should also schedule time afterward to update their emergency action plan and conduct appropriate exercises. A short awareness presentation and a skills-based AVIRT course are not the same product, even when both are described informally as “active-shooter training.”