Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium.
1 The beam of your boat is the width at the widest part of the boat.  To measure the beam, stand inside the boat and run a measuring tape from the port (left) side to the starboard (right) side at the widest section of your boat.
When paddling in beam seas, the stern the kayak tends to swing around to point downwind, also called bowcocking or weathercocking.) A rudder is a great advantage in these situations as it not only helps the boat stay on course but can be used to help get the kayak back on course.