In 1862 Thames Ironworks in West Ham built the iron-hulled Yavari and Yapura under contract to the James Watt Foundry of Birmingham. The ships were designed as combined cargo, passenger and gunboats for the Peruvian Navy. The ships were built in "knock down" form; that is, they were assembled with bolts and nuts at the shipyard, dismantled into thousands of parts small enough to transport, and shipped to their final destination to be assembled with rivets and launched on the lake. The kits for the two ships consisted of a total 2,766 pieces between them. Each piece was no more than 3.5. cwt—what a mule could carry—because the railway from the Pacific Ocean port of Arica went only, as far as Tacna. From there pack mules had to carry them the remaining to Puno on the lake. The original British contractor got the parts to Tacna but failed to complete the section of the journey with mules. This was not resumed until 1868 and the first plates for Yavaris hull were laid at Puno in 1869. Yavari was launched in 1870 and Yapura in 1873. Yavari was long and had a two-cylindersteam engine, which was fuelled with dried llamadung. In 1914, Yavaris hull was extended to increase her cargo capacity. At the same time she was re-engined as a motor vessel with a Bolinder four-cylinder hot bulb engine. The War of the Pacific of 1879–83 impoverished the Peruvian government, so in 1890 UK investors established the Peruvian Corporation which took over operation of Peru's railways and lake ships. In 1975 Peru nationalised the corporation and Yavari and Yapura passed to the state railway companyENAFER. In 1976 they were transferred back to the Peruvian Navy, who convertedYapura into a hospital ship and renamed her BAP Puno but discarded Yavari. In 1987 charitable interests bought Yavari to restore her. She is now moored at Puno Bay where she provides static tourist accommodation while undergoing full restoration. In 2015, with restoration almost complete, a group of young East Enders sponsored by the West Ham United Foundation trekked over the Andes from Tacna to Puno following the original route of the Yavari. They participated in a "second maiden voyage" on Lake Titicaca, accompanied by the British Ambassador to Peru, H.E. Anwar Choudhury.
