The Lagoon 400 and 400 S2 are among the most widely known cruising catamarans on the used market, which also means there is a very wide gap between a genuinely well-kept example and one that simply photographs well.
This 80-page model-specific Survey-Prep Guide was created to help serious buyers evaluate a Lagoon 400 or 400 S2 properly before spending more money on travel, haul-outs, formal surveys, or deposits.
This is not a generic checklist and it is not a glossy sales brochure. It is a practical, structured buying guide focused specifically on the Lagoon 400 / 400 S2, built to help you ask better questions, request the right photos, understand the known risk areas, and filter out the wrong boats earlier.
Inside, the guide walks through the model in detail, including production years, 400 vs. 400 S2 differences, owner and charter layouts, core specifications, common strengths, age-related wear patterns, and the areas that deserve closer scrutiny on this specific platform. Particular attention is given to the real issues that matter on older production catamarans, including bulkheads and tabbing, bridgedeck stress, deck moisture around fittings, glazing and hatch leaks, escape hatch recall checks, steering feel, saildrives, engine spaces, charter wear, electrical layering, through-hulls, plumbing fatigue, rudders, mast-step load areas, and overall trim and loading.
The guide includes:
model overview and version differences
key specifications and layout variants
known weak points and age-related issues
model-specific red flags and positive indicators
seller questions that get past vague broker language
a detailed remote photo checklist
sea trial guidance focused on what actually matters
negotiation notes based on typical findings
long-term ownership considerations
practical communication templates you can copy and use
escape hatch safety appendix for cruising catamarans
In plain terms, this guide is designed to help buyers spend money in the right order. A single avoided wasted trip, one better-informed negotiation, or one major issue identified before survey can save far more than the cost of the guide.
If you are seriously considering a Lagoon 400 or 400 S2, this gives you a far more structured and model-specific starting point than relying on listing language, scattered forum comments, or generic catamaran buying advice. It is built for buyers who want clarity before commitment.
