## 1 Introduction
The sensor nodes' data is reached towards the nearest sinks by using various routing mechanisms. This approach poses great problems in terms of scalability when the network size is increased. Moreover, it creates a bottleneck and lowers the performance of the network. Additionally, the UWSN closer to these sinks depletes their energy very rapidly and creates energy holes that force the rest of the nodes for distant communication and result in rapid energy depletion. Hence, the overall network lifetime is reduced. The proposed protocol addresses the above-mentioned issues by integrating three approaches, including clustering, mobile sinks use, and transmit power control. The challenges that we encountered during the design were as follows:The first challenge is how to manage and use mobility in the networks to continuous connectivity of the nodes and AUV for improving communication efficiently. The second challenge is hole energy creation to some extent, regarding the highly heterogeneous sensors, and the vast diversity of energy and depth of the sensors to apply clustering technique. The third challenge is the cost of the transmission. The energy cost is still a critical apprehension in the sensor system. The fourth challenge is how to exploit the AUVs, which are high-cost devices, with the collaborated CHs node selection, to address transmission distance challenge for achieving the stabilization of networks in sparse regions. The main contributions of the proposed scheme are three-fold:  
* Propose a novel adaptive power control routing protocol to efficiently use their energy and to reduce the channel interference that ultimately increases the network lifetime, reduces the interference, and avoids the energy hole creation. * Furthermore, the clustering technique is incorporated in the dense regions to reduce the duplication of transmitted packets and to balance the load of data packets that potentially lowers the interference and improves the battery usage of sensor nodes. * Finally, local deployment of mobile sinks or AUVs to retrieve packets through two CHs as a relay that successfully received data packets from the source to collaborative protocol using a predefined distance threshold to evaluate AUV position-aware mobility such that the distance between transmitting and receiving devices is calculated. If the distance is less than or equal to the distance threshold value, then the data packet is transmitted and received at the receiver, otherwise the data packet is dropped, and that distance threshold value depends on the RSSI value calculated by the receiver. The protocol is designed for one-way data transmission from mobile sinks to the static sink for enhancing the network lifetime by reducing transmission distance and by minimizing the interference. Moreover, it also helps to avoid energy holes and increases successful packet delivery. The rest of this article is structured as follows: the relevant work done in UWSNs is checked and classified in Section 2. The method of the schemes proposed is described in Section 3. Section 4 deals with the simulation setup and performance evaluation of the proposed scheme, followed by Section 5's conclusion.