No, it is not currently possible to travel as fast as a plane by sea using conventional means. Airplanes are designed to travel at high speeds through the air, while watercraft, such as ships and boats, have different physical limitations.
The maximum speed of a typical commercial jet airliner is around 600-700 miles per hour (965-1,125 kilometers per hour), while the fastest cruise ships can reach speeds of about 30-35 knots (34-40 miles per hour or 55-65 kilometers per hour). This significant difference in speed is primarily due to the differences in the medium in which they operate.
Airplanes experience significantly less resistance and friction in the air compared to ships in the water. The air is less dense, allowing airplanes to achieve higher speeds with relatively less energy consumption. On the other hand, ships have to overcome the resistance caused by the water, which requires more power and limits their maximum speed.
While there have been attempts to develop faster ships using advanced technologies such as hydrofoils and wave-piercing designs, they have not yet achieved speeds comparable to airplanes. Additionally, the size and weight of ships make it challenging to reach extremely high speeds without compromising stability and safety.
It's worth noting that there are ongoing research and development efforts in the maritime industry, such as the exploration of high-speed hydrofoil designs or the possibility of utilizing magnetic levitation (maglev) technology for watercraft. However, these technologies are still in the experimental stages and not yet commercially viable for widespread use.