A professional-grade embarkation ladder must utilize hardwood steps (typically ash, oak, or teak) that are free from knots and cracks. The four bottom steps are often made of oil-resistant rubber to provide flexibility and durability upon impact with the pilot boat. The side ropes must be manila rope or spun polyester with a breaking strength exceeding 24kN, and a diameter of at least 18mm. All wooden steps must be non-slip and treated with a clear, non-toxic preservative that does not hide the wood grain, allowing for easy inspection of structural integrity.