The rapid expansion of Brazilian jiu-jitsu (BJJ), against the backdrop of territorially heterogeneous access to highly qualified coaches, makes the task of developing a scientifically verified methodology for autonomous training particularly significant. Within the present study, a comprehensive, validated system of independent training for a BJJ athlete is formed, aimed at the targeted optimization of specific physiological characteristics and the development of key psychological competencies under conditions of limited external supervision. The methodological basis includes a systematic review of academic literature, a comparison of block periodization protocols, and a content analysis of practices for the use of wearable technologies to objectify training load. The obtained results made it possible to construct an integrated model based on the logic of block periodization (accumulation, transmutation, and realization blocks) with an emphasis on the development of strength endurance and power; in particular, in the transmutation block it is advisable to use intensities on the order of 85–90%. It is demonstrated that psychological predictors of sports performance, including Perseverance (r=0.179) and Self-efficacy, are statistically associated with the athlete’s level of experience and require purposeful formation through self-reflection protocols. A self-monitoring system combining field testing (jump tests) and the use of inertial sensors is considered a critically important component for timely load adjustment and reduction of the pronounced risk of injury, estimated at 5.5 injuries per 1000 hours of training. Practical implementation of the proposed methodology provides the athlete with tools sufficient to achieve competitive readiness under conditions of self-training, compensating for the absence of continuous coaching supervision, and the presented materials are of interest to competitive BJJ athletes focused on systematizing the process and maximizing performance.

In the context of profound structural transformation of the maritime industry driven by the implementation of the Industry 4.0 concept and the consistent tightening of environmental requirements by the International Maritime Organization (IMO), the digital modernization of fleet technical operation processes becomes strategically critical and becomes a key prerequisite for maintaining the long-term competitiveness of shipping companies. The study focuses on assessing the effectiveness of integrating digital solutions across the full spectrum of operations: from the transition to electronic watchkeeping logs and intelligent checklists to the implementation of predictive analytics systems aimed at optimizing fuel efficiency and monitoring the technical condition of heat-exchange equipment. The methodological basis of the work relies on a system analysis of empirical data for 2024–2025, drawing on reports of leading classification societies (DNV, Lloyd’s Register), design and operational documentation from manufacturers of marine equipment, as well as a current corpus of scientific publications. Based on the analysis performed, it is substantiated that the transition from fragmented paper-based document management to integrated digital ecosystems makes it possible to reduce the number of human-factor-related errors by 70–80%, which fundamentally increases the reliability of technical operation procedures. It is shown that the use of machine learning (ML) algorithms for continuous monitoring of operating parameters of heat exchangers and separators provides the possibility of abandoning the traditional model of planned preventive maintenance (PPM) in favor of the condition-based maintenance (CBM) concept. Such a transformation of maintenance strategies leads to a reduction in total operating costs and a decrease in the vessel’s carbon footprint, ensuring alignment with regulatory requirements for the Carbon Intensity Indicator (CII) and the Energy Efficiency Existing Ship Index (EEXI). Particular emphasis is placed on the analysis of mandatory requirements for the digitalization of bunkering operations entering into force in Singapore in 2025, which establish a new global benchmark in the field of transparency, traceability, and verifiability of fuel operations and exert a catalytic influence on the formation of unified international standards for digital control of fuel logistics.