Whether you are a new diver or a dive instructor, or anywhere in between, you always have the need to write something down underwater.For the new diver, it may be for asking questions later back on the boat or shore about why you felt something or what kind of marine life you encountered. For the photographer, it may be the camera settings used on specific shots you took for review later. For the instructor, the ability to write underwater may be necessary for an evaluation of a student's skills. The XS Scuba Deluxe Folding Slate with its great folding design gives you plenty of room to write down that important information with its unique adjustable lead pencil. The pencil is attached to the slate with a bright yellow coiled lanyard so, you won't lose it and attaching the slate to your gear is quick and easy with the sturdy locking gate snap clip. When slate is folded closed it measures 5.75 x 7.5" (14.6 x 19cm) and will fit conveniently in most BCD pockets. When unfolded the slate measures 10.75 x 7.5" (27.3 x 19cm) so, there is plenty of writing area available. Slate is made from a durable plastic material and is erasable.