JSmem 11:255 :ܝܡܐ ܒܐܠ̈ܦܘܗܝ ܐܩܝܡ ܢܝܫܐ ܕܨܠܝܒܘܬܗ‏ : the sea with its ships raised up a symbol of His crucifixion
See the entire entry for nīšā n.m. sign, goal