The field of underwater robotics is moving towards the development of more advanced and robust navigation systems, leveraging new sensor technologies such as compact 3D sonars. Researchers are exploring novel algorithms and approaches to address the challenges of underwater exploration, including strong currents, limited acoustic bandwidth, and persistent sensing requirements. Notable advancements include the development of nature-inspired swarm optimisation algorithms and sensor hallucination techniques for real-time motion planning. These innovations are expected to enable more efficient and effective underwater exploration and inspection missions. Noteworthy papers include: Nauplius Optimisation for Autonomous Hydrodynamics, which presents a novel swarm optimisation algorithm for underwater robotics. Underwater Dense Mapping with the First Compact 3D Sonar, which introduces calibration procedures and mapping pipelines for compact 3D sonars. SHRUMS: Sensor Hallucination for Real-time Underwater Motion Planning with a Compact 3D Sonar, which proposes a novel underwater navigation pipeline integrating 3D sonar data.