Recreation
RAMFILL
Centurion and Supra's fast-fill ballast technology that fills the boat's hard tanks in roughly 90 seconds for quick surf-ready setup and side switches.
RAMFILL is a term from limnology — the scientific study of inland waters. The detailed explanation below covers the definition, why the concept matters to lake water-quality interpretation, and how it intersects with the LakeGrade rubric. Reading RAMFILL alongside the LakeGrade rubric helps make the rubric's structure intuitive — each grading parameter maps directly onto an established limnological concept.
The per-lake pages on LakeQuality always show the specific RAMFILL value for that lake, so you can move from the general concept to the specific lake without leaving the site.
What It Means for Your Lake
RAMFILL is the fast-fill ballast technology used on Centurion and Supra wake boats. It fills the boat's ballast tanks in about 90 seconds, dramatically reducing the wait between launching and surfing. Quick fill-and-drain ballast means less waiting and more surfing, and it allows for even ballast distribution. Because RAMFILL moves water so quickly, switching surf sides becomes as easy as pressing a button—the system redistributes water and, combined with the surf system's flaps, transfers the wave from one side to the other. On Centurion, RAMFILL feeds a seven-tank ballast layout paired with the Opti-V hull.
Frequently Asked Questions
What is ramfill?
Centurion and Supra's fast-fill ballast technology that fills the boat's hard tanks in roughly 90 seconds for quick surf-ready setup and side switches.
Why does ramfill matter for lake health?
RAMFILL is the fast-fill ballast technology used on Centurion and Supra wake boats. It fills the boat's ballast tanks in about 90 seconds, dramatically reducing the wait between launching and surfing. Quick fill-and-drain ballast means less waiting and more surfing, and it allows for even ballast di...
Related Terms
Added weight (water-filled bags or hard weights) placed in the boat to sink the hull deeper and build a bigger, more defined wake.
A rigid, molded ballast tank built below the floor of a wake boat that holds water weight without occupying storage or seating space and avoids the mildew issues of soft bags.
Centurion's hull design, anchoring the brand's surf system and credited with producing some of the longest production-tier wakesurf waves on the market.
A boat-mounted device that redirects water flow at the transom to shape a clean, surfable wave on either side at the push of a button, eliminating the need to physically lean and re-weight the boat to switch sides.
Source: EPA National Aquatic Resource Surveys, 2026.