This is the 4262nd most frequent Spanish word.
náutico
Related to navigation, sailing, or maritime activities.
Here, "náutico" is used as an adjective describing "equipo", it refers to equipment related to navigation, boating, or the sea.
El equipo náutico está listo para la competición.
The nautical equipment is ready for the competition.
In this sentence, "náutico" modifies "mapa", indicating that the map is specialized for navigation at sea.
Compramos un mapa náutico para nuestra travesía en el océano.
We bought a nautical map for our journey in the ocean.
Here, "náutica" is part of the term "ingeniería náutica" where it relates to engineering fields concerning maritime technology and design.