Answer
Tsawon tsayin $H_s$ na maɓuɓɓugar ruwan raƙuman ruwa shine tsayin axial lokacin da aka matsa ruwan bazara ta yadda duk raƙuman ruwa suna cikin hulɗa. Don bazarar Crest-to-Crest, $H_s = N \cdot t$, inda $N$ shine adadin juyawa kuma $t$ shine kaurin kayan. Koyaya, don maɓuɓɓugan ruwa tare da ƙarshen shim, dabarar ta zama $ H_s = (N+2) \cdot t$. Yayin da bazara ke gabatowa $H_s$, lanƙwan jujjuyawar lodi ya zama marar layi, yana nuna ƙaƙƙarfan ƙarfi yayin da wurin hulɗa ke motsawa daga kololuwar igiyar ruwa zuwa saman gaba ɗaya. Yin aiki da marmaro kusa da $H_s$ yana da sanyin gwiwa saboda 'ƙarfin damuwa' yakan wuce iyakar kayan abu, yana kaiwa zuwa saiti na dindindin. Masu zanen kaya suna amfani da ma'aunin tsaro $\eta = \sigma_{samar da ƙasa} / \ sigma_{m}$ kuma yawanci suna iyakance matsakaicin juzu'in aiki zuwa $80\%$ na tafiye-tafiyen da ake samu zuwa $H_s$ don kula da halayen madaidaiciyar tsinkaya.
