Literature Reference: 无复横槎碍柳条。—— 《送唐中丞开淘西湖夏日游泛因书示郡人》 朱庆余 No more horizontal raft hinders the willow branches. Source from 'Seeing Off Tang Zhongcheng to Dredge the West Lake in Summer and Sailing, While Writing to the County People' by Zhu Qingyu.
横: Horizontal or vertical, it's all the same. Opposed to "longitudinal."
槎: Raft: Floating Raft, Riding the Raft.
Meaning: Heng Cha symbolizes bravery and resilience, like a boat crossing the river, undeterred by wind and waves.