Intro: homemade inflatable boat. i’m starting this topic to both log my experiments and to petition contributions and ideas from others. the basic premise, to build a. The code of practice for open rescue boats of less than 15 metres in length rev 0712 4 11.3.1 general requirements 11.3.2 damage stability: rigid hull boats. Avon searider 5.4 metre rib avon have manufactured searider rib’s (rigid hull inflatable boats) in 4m, 4.7m, 5.4m, 6m, 6.4m, 7.4m & 8.4m lengths for many years..