On the 30th of this month I am anchoring a peice of stainless steel on a rock at low tide. The s/s has coords etched on it of actual cache. Due to extreme tide @ full moon (-0.3ft low and 25.4 ft high) this month cache will only be accessable (dry) about 20 days / year [}].hehehe..1 week after I plant it there will be 5 ft of water over it a LOW tide.