Nautikai blog

Through-hull vs transom-mount depth sounders — which choice for your 2026 sailboat

The choice between through-hull and transom-mount depth sounders determines measurement accuracy (depth, speed, temperature) for 10-15 years. Through-hull = maximum accuracy, dry dock installation. Transom-mount = installation simplicity, 10-15% accuracy loss depending on point of sail. Technical comparison, Airmar/Raymarine/B&G brands, real-world examples for 30-50 ft sailboats.