About the choice of anchor equipment for inland navigation vessels
This article presents the calculations results on the anchor choice of the various types inland navigation vessels supply and dimensions according to the Russian River Register Rules (hereinafter referred to as the RRR Rules) and the European regulations - Resolution No. 61 of the United Nations Economic Commission for Europe «Recommendations concerning the European level harmonized technical requirements applicable to inland navigation vessels», Directive (EU) 2016/1629 of the European Parliament and of the 14 September 2016 Council and the European Standard, establishing technical requirements for inland navigation vessels (ES-TRIN standard) edition 2019/1, as well as common rules for Det Norske Veritas and Germanischer Lloyd for inland navigation vessels 2018 edition (hereinafter DNV GL Rules). Work on the different methods regulated anchor supply comparison of inland navigation vessels is relevant, due to the fact that there are non-compliance anchor supply cases concerning Russian vessels entering the inland EU waterways, European regulations, as well as the RRR unjustified overstatement cases rules dealing with the requirements on anchor supply in relation to displacement vessels with the hull material other than steel. Matching anchors the weight is determined in accordance with clause 3.2.1 of Part V of the Ships Classification and Construction Rules on the one hand, and clauses 1-6 of Article 13.01 of the ES-TRIN standard (the same methodology is used in the DNV GL rules) on the other hand. To assess the main holding power anchor supply component with different approaches to the anchor supply ships strategy, the conditional holding anchor weight supply concept was introduced. The comparison conditional holding weight results when placing the vessel only on the bow anchors are summarized in the table presented in the article. The results analysis shows that in most cases, the methods for selecting anchor supplies according to the RRR Rules and European regulations do not allow obtaining comparable results, which to some extent can be explained by different approaches to supply characteristics definition - the calculated dependencies determining factor.