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The past 15 years have witnessed the rapid development of China's cruise industry from scratch and the formation of a policy system in the cruise industry, reflecting the shift of the Chinese government's attitude towards the cruise industry from wait-and-see, recognition and encouragement to active support. The paper conducts a statistical analysis of 128 policies related to the cruise industry issued by China's administrative departments at all levels. It is found that the release of policies synchronizes with the development of the cruise industry, with each one providing feedback to the other. The policies do not exhibit a time lag with respect to their effects. The evolution of policy types from macro-level guidance to concrete operation is rapid, with the policy structure gradually improving. In line with current characteristics of the development of China's cruise industry, the themes of the policies concentrate on five areas: cruise tourism services and products, port construction and development, cruise industry chain expansion, cruise industry environment and cruise industry management. However, there is still a lack of adequate policies to support and guide the industrial upgrading of cruise operation and cruise construction and its green and low-carbon development. In addition, the paper points out the main directions of future policy formulation.

In this paper, a novel fusion network for automatic modulation classification (AMC) is proposed in underwater acoustic communication, which consists of a Transformer and depth-wise convolution (DWC) network. Transformer breaks the limitation of sequential signal input and establishes the connection between different modulations in a parallel manner. Its attention mechanism can improve the modulation recognition ability by focusing on the key information. DWC is regularly inserted in the Transformer network to constitute a spatial-temporal structure, which can enhance the classification results at lower signal-to-noise ratios (SNRs). The proposed method can obtain more deep features of underwater acoustic signals. The experiment results achieve an average of 92.1% at −4 dB ≤ SNR ≤ 0 dB, which exceed other state-of-the-art neural networks.

During underwater operations, divers must determine their own trajectories using the Inertial Navigation System (INS) they carry to improve operational efficiency. However, the INS contains a sensor bias that is also incorporated into the quadratic integration process to obtain the displacement, resulting in trajectory drift of the divers during prolonged self-guidance. To overcome the above problem, other aids are needed to correct the accumulated error of the INS. The single-beacon Assisted Inertial Navigation (AIN) method can improve the flexibility of inertial error correction while simplifying the localization equipment, which is suitable for the INS cumulative error correction scenario of divers. However, most of the traditional single-beacon assisted correction methods do not consider the effect of acoustic line bending on hydroacoustic ranging, and at the same time, they do not consider the problem of singular or pathological coefficient matrices introduced by inertial navigation neighbor localization deviations. Based on the above two shortcomings, this paper uses the acoustic velocity profile for acoustic line tracking, combines the localization idea of Mobile Primitives (MP), and proposes an MP-based acoustic line tracking-Assisted Inertial Navigation Localization (AINL) method, which constructs a sliding time window (STW) by taking the historical positioning of divers as a virtual primitive, and combines the nonlinear optimization method for iterative optimization search as a means to improve the accuracy and stability of self-navigation of the divers.

The UK Border Force has returned a group of migrants to France after their small boat got into trouble in the English Channel. This appears to be a departure from past policy, at a crucial time. Channel crossings are rising again as the weather gets warmer, and remain a controversial part of migration discussions. The Conversation's Avery ANAPOL asked Alex BALCH, who researches migration and human rights at the University of Liverpool, what this episode means for the future of collaboration between the two countries on crossings.

The Rolls-Royce led Advanced Autonomous Waterborne Applications Initiative (AAWA) project unveiled a vision of how remote and autonomous shipping will become a reality, changing the nature of the shipping industry.

The Rolls-Royce led Advanced Autonomous Waterborne Applications Initiative (AAWA) project unveiled a vision of how remote and autonomous shipping will become a reality, changing the nature of the shipping industry.

Cruise Lines International Association (CLIA) has released the Cruise Travel Report a revealing look at the attitudes, behaviors and travel preferences of cruisers and non-cruisers. The report delves into a variety of topics ranging from travel planning and the use of travel agents to vacation companions and destination preferences. A key highlight of the study defines a new "Cruise Generation," outlining the growing number of Millennials and Generation Y travelers embracing and enjoying cruise travel.

A boat that hit something under water and dunked a group of fourth graders into the Chesapeake Bay had ventured into a prohibited area, a U.S. Coast Guard official said Thursday.

On April 15, a century have passed since the Titanic foundered during its maiden voyage. Since then there has been a widespread belief that in a disaster, women and children will be saved first. Based on analyses of 18 of the most notable shipwrecks from the 19th century until today, researchers from Uppsala University conclude that this is a myth.

The quick-thinking crew of a cargo ship thwarted a possible a hijacking or robbery at sea Saturday off Davao del Sur province by locking themselves in their quarters, the Philippine Coast Guard (PCG) said. About eight men on two motorized outriggers boarded the MV Cecilia, but the crew quickly locked all the vessel's hatches and windows, said Commodore Joselito dela Cruz, PCG district commander on the main southern island of Mindanao. He said the suspected pirates left empty-handed before a Coast Guard vessel arrived at the site, near Balut Island.

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Six crew members are still missing after a general cargo freighter sank in the Singapore Strait following a collision with a chemical tanker at 8:14 p.m. (7.14 a.m. ET) on Dec. 16.

Pirates of the Caribbean, a Disney Fantasy or a Real Threat?